#include <stdio.h>
#include <string.h>

char tobin(char* buf);
char value(char,char);

int main(int argc,char* argv[]){

  FILE *fin,*fout;
  char buf[34];
  char prebin[8];
  char bin[4];

  if((fin = fopen(argv[1],"r")) == NULL){
    fprintf(stderr,"File open error: %s \n",argv[1]);
  }
  if((fout = fopen(argv[2],"wb")) == NULL){
    fprintf(stderr,"File open error: %s \n",argv[2]);
  }

  while(1){
    if(fgets(buf,34,fin)==NULL){
      break;
    }
    if(strcmp(buf,"\n") == 0){
      break;
    }
    buf[32] = '\0';

    /*printf("%s\n",buf);*/
    
    /* make char 0x'char'*/
    if((prebin[7] = tobin(buf+28)) == 'p'){
      fprintf(stderr,"tobin error 1.\n");
      break;
    }else if((prebin[6] = tobin(buf+24)) == 'p'){
      fprintf(stderr,"tobin error.\n");
      break;
    }else if((prebin[5] = tobin(buf+20)) == 'p'){
      fprintf(stderr,"tobin error.\n");
      break;
    }else if((prebin[4] = tobin(buf+16)) == 'p'){
      fprintf(stderr,"tobin error.\n");
      break;
    }else if((prebin[3] = tobin(buf+12)) == 'p'){
      fprintf(stderr,"tobin error.\n");
      break;
    }else if((prebin[2] = tobin(buf+8)) == 'p'){
      fprintf(stderr,"tobin error.\n");
      break;
    }else if((prebin[1] = tobin(buf+4)) == 'p'){
      fprintf(stderr,"tobin error.\n");
      break;
    }else if((prebin[0] = tobin(buf)) == 'p'){
      fprintf(stderr,"tobin error last .\n");
      break;
    }

    bin[0] = value(prebin[0],prebin[1]);
    bin[1] = value(prebin[2],prebin[3]);
    bin[2] = value(prebin[4],prebin[5]);
    bin[3] = value(prebin[6],prebin[7]);

    fwrite(bin,1,4,fout);
    
  }

  fclose(fin);
  fclose(fout);

  return 0;
  
}

char tobin(char* buf){

  if(strcmp(buf,"0000")==0){
    *(buf) = '\0';
    return '0';
  }else if(strcmp(buf,"0001")==0){
    *(buf)= '\0';
    return '1';
  }else if(strcmp(buf,"0010")==0){
    *(buf)= '\0';
    return '2';
  }else if(strcmp(buf,"0011")==0){
    *(buf)= '\0';
    return '3';
  }else if(strcmp(buf,"0100")==0){
    *(buf)= '\0';
    return '4';
  }else if(strcmp(buf,"0101")==0){
    *(buf)= '\0';
    return '5';
  }else if(strcmp(buf,"0110")==0){
    *(buf)= '\0';
    return '6';
  }else if(strcmp(buf,"0111")==0){
    *(buf)= '\0';
    return '7';
  }else if(strcmp(buf,"1000")==0){
    *(buf)= '\0';
    return '8';
  }else if(strcmp(buf,"1001")==0){
    *(buf)= '\0';
    return '9';
  }else if(strcmp(buf,"1010")==0){
    *(buf)= '\0';
    return 'a';
  }else if(strcmp(buf,"1011")==0){
    *(buf)= '\0';
    return 'b';
  }else if(strcmp(buf,"1100")==0){
    *(buf)= '\0';
    return 'c';
  }else if(strcmp(buf,"1101")==0){
    *(buf)= '\0';
    return 'd';
  }else if(strcmp(buf,"1110")==0){
    *(buf)= '\0';
    return 'e';
  }else if(strcmp(buf,"1111")==0){
    *(buf)= '\0';
    return 'f';
  }
  return 'p';

}

char value(char hi,char low){
  switch(hi){
  case '0' : 
    switch(low){
    case '0' : return 0x00;
    case '1' : return 0x01;
    case '2' : return 0x02;
    case '3' : return 0x03;
    case '4' : return 0x04;
    case '5' : return 0x05;
    case '6' : return 0x06;
    case '7' : return 0x07;
    case '8' : return 0x08;
    case '9' : return 0x09;
    case 'a' : return 0x0a;
    case 'b' : return 0x0b;
    case 'c' : return 0x0c;
    case 'd' : return 0x0d;
    case 'e' : return 0x0e;
    case 'f' : return 0x0f;
    }
    break;
  case '1' : 
    switch(low){
    case '0' : return 0x10;
    case '1' : return 0x11;
    case '2' : return 0x12;
    case '3' : return 0x13;
    case '4' : return 0x14;
    case '5' : return 0x15;
    case '6' : return 0x16;
    case '7' : return 0x17;
    case '8' : return 0x18;
    case '9' : return 0x19;
    case 'a' : return 0x1a;
    case 'b' : return 0x1b;
    case 'c' : return 0x1c;
    case 'd' : return 0x1d;
    case 'e' : return 0x1e;
    case 'f' : return 0x1f;
    }
    break;
  case '2' : 
    switch(low){
    case '0' : return 0x20;
    case '1' : return 0x21;
    case '2' : return 0x22;
    case '3' : return 0x23;
    case '4' : return 0x24;
    case '5' : return 0x25;
    case '6' : return 0x26;
    case '7' : return 0x27;
    case '8' : return 0x28;
    case '9' : return 0x29;
    case 'a' : return 0x2a;
    case 'b' : return 0x2b;
    case 'c' : return 0x2c;
    case 'd' : return 0x2d;
    case 'e' : return 0x2e;
    case 'f' : return 0x2f;
    }
    break;
  case '3' : 
    switch(low){
    case '0' : return 0x30;
    case '1' : return 0x31;
    case '2' : return 0x32;
    case '3' : return 0x33;
    case '4' : return 0x34;
    case '5' : return 0x35;
    case '6' : return 0x36;
    case '7' : return 0x37;
    case '8' : return 0x38;
    case '9' : return 0x39;
    case 'a' : return 0x3a;
    case 'b' : return 0x3b;
    case 'c' : return 0x3c;
    case 'd' : return 0x3d;
    case 'e' : return 0x3e;
    case 'f' : return 0x3f;
    }
    break;
  case '4' : 
    switch(low){
    case '0' : return 0x40;
    case '1' : return 0x41;
    case '2' : return 0x42;
    case '3' : return 0x43;
    case '4' : return 0x44;
    case '5' : return 0x45;
    case '6' : return 0x46;
    case '7' : return 0x47;
    case '8' : return 0x48;
    case '9' : return 0x49;
    case 'a' : return 0x4a;
    case 'b' : return 0x4b;
    case 'c' : return 0x4c;
    case 'd' : return 0x4d;
    case 'e' : return 0x4e;
    case 'f' : return 0x4f;
    }
    break;
  case '5' : 
    switch(low){
    case '0' : return 0x50;
    case '1' : return 0x51;
    case '2' : return 0x52;
    case '3' : return 0x53;
    case '4' : return 0x54;
    case '5' : return 0x55;
    case '6' : return 0x56;
    case '7' : return 0x57;
    case '8' : return 0x58;
    case '9' : return 0x59;
    case 'a' : return 0x5a;
    case 'b' : return 0x5b;
    case 'c' : return 0x5c;
    case 'd' : return 0x5d;
    case 'e' : return 0x5e;
    case 'f' : return 0x5f;
    }
    break;
  case '6' : 
    switch(low){
    case '0' : return 0x60;
    case '1' : return 0x61;
    case '2' : return 0x62;
    case '3' : return 0x63;
    case '4' : return 0x64;
    case '5' : return 0x65;
    case '6' : return 0x66;
    case '7' : return 0x67;
    case '8' : return 0x68;
    case '9' : return 0x69;
    case 'a' : return 0x6a;
    case 'b' : return 0x6b;
    case 'c' : return 0x6c;
    case 'd' : return 0x6d;
    case 'e' : return 0x6e;
    case 'f' : return 0x6f;
    }
    break;
  case '7' : 
    switch(low){
    case '0' : return 0x70;
    case '1' : return 0x71;
    case '2' : return 0x72;
    case '3' : return 0x73;
    case '4' : return 0x74;
    case '5' : return 0x75;
    case '6' : return 0x76;
    case '7' : return 0x77;
    case '8' : return 0x78;
    case '9' : return 0x79;
    case 'a' : return 0x7a;
    case 'b' : return 0x7b;
    case 'c' : return 0x7c;
    case 'd' : return 0x7d;
    case 'e' : return 0x7e;
    case 'f' : return 0x7f;
    }
    break;
  case '8' : 
    switch(low){
    case '0' : return 0x80;
    case '1' : return 0x81;
    case '2' : return 0x82;
    case '3' : return 0x83;
    case '4' : return 0x84;
    case '5' : return 0x85;
    case '6' : return 0x86;
    case '7' : return 0x87;
    case '8' : return 0x88;
    case '9' : return 0x89;
    case 'a' : return 0x8a;
    case 'b' : return 0x8b;
    case 'c' : return 0x8c;
    case 'd' : return 0x8d;
    case 'e' : return 0x8e;
    case 'f' : return 0x8f;
    }
    break;
  case '9' : 
    switch(low){
    case '0' : return 0x90;
    case '1' : return 0x91;
    case '2' : return 0x92;
    case '3' : return 0x93;
    case '4' : return 0x94;
    case '5' : return 0x95;
    case '6' : return 0x96;
    case '7' : return 0x97;
    case '8' : return 0x98;
    case '9' : return 0x99;
    case 'a' : return 0x9a;
    case 'b' : return 0x9b;
    case 'c' : return 0x9c;
    case 'd' : return 0x9d;
    case 'e' : return 0x9e;
    case 'f' : return 0x9f;
    }
    break;
  case 'a' : 
    switch(low){
    case '0' : return 0xa0;
    case '1' : return 0xa1;
    case '2' : return 0xa2;
    case '3' : return 0xa3;
    case '4' : return 0xa4;
    case '5' : return 0xa5;
    case '6' : return 0xa6;
    case '7' : return 0xa7;
    case '8' : return 0xa8;
    case '9' : return 0xa9;
    case 'a' : return 0xaa;
    case 'b' : return 0xab;
    case 'c' : return 0xac;
    case 'd' : return 0xad;
    case 'e' : return 0xae;
    case 'f' : return 0xaf;
    }
    break;
  case 'b' : 
    switch(low){
    case '0' : return 0xb0;
    case '1' : return 0xb1;
    case '2' : return 0xb2;
    case '3' : return 0xb3;
    case '4' : return 0xb4;
    case '5' : return 0xb5;
    case '6' : return 0xb6;
    case '7' : return 0xb7;
    case '8' : return 0xb8;
    case '9' : return 0xb9;
    case 'a' : return 0xba;
    case 'b' : return 0xbb;
    case 'c' : return 0xbc;
    case 'd' : return 0xbd;
    case 'e' : return 0xbe;
    case 'f' : return 0xbf;
    }
    break;
  case 'c' : 
    switch(low){
    case '0' : return 0xc0;
    case '1' : return 0xc1;
    case '2' : return 0xc2;
    case '3' : return 0xc3;
    case '4' : return 0xc4;
    case '5' : return 0xc5;
    case '6' : return 0xc6;
    case '7' : return 0xc7;
    case '8' : return 0xc8;
    case '9' : return 0xc9;
    case 'a' : return 0xca;
    case 'b' : return 0xcb;
    case 'c' : return 0xcc;
    case 'd' : return 0xcd;
    case 'e' : return 0xce;
    case 'f' : return 0xcf;
    }
    break;
  case 'd' : 
    switch(low){
    case '0' : return 0xd0;
    case '1' : return 0xd1;
    case '2' : return 0xd2;
    case '3' : return 0xd3;
    case '4' : return 0xd4;
    case '5' : return 0xd5;
    case '6' : return 0xd6;
    case '7' : return 0xd7;
    case '8' : return 0xd8;
    case '9' : return 0xd9;
    case 'a' : return 0xda;
    case 'b' : return 0xdb;
    case 'c' : return 0xdc;
    case 'd' : return 0xdd;
    case 'e' : return 0xde;
    case 'f' : return 0xdf;
    }
    break;
  case 'e' : 
    switch(low){
    case '0' : return 0xe0;
    case '1' : return 0xe1;
    case '2' : return 0xe2;
    case '3' : return 0xe3;
    case '4' : return 0xe4;
    case '5' : return 0xe5;
    case '6' : return 0xe6;
    case '7' : return 0xe7;
    case '8' : return 0xe8;
    case '9' : return 0xe9;
    case 'a' : return 0xea;
    case 'b' : return 0xeb;
    case 'c' : return 0xec;
    case 'd' : return 0xed;
    case 'e' : return 0xee;
    case 'f' : return 0xef;
    }
    break;
  case 'f' : 
    switch(low){
    case '0' : return 0xf0;
    case '1' : return 0xf1;
    case '2' : return 0xf2;
    case '3' : return 0xf3;
    case '4' : return 0xf4;
    case '5' : return 0xf5;
    case '6' : return 0xf6;
    case '7' : return 0xf7;
    case '8' : return 0xf8;
    case '9' : return 0xf9;
    case 'a' : return 0xfa;
    case 'b' : return 0xfb;
    case 'c' : return 0xfc;
    case 'd' : return 0xfd;
    case 'e' : return 0xfe;
    case 'f' : return 0xff;
    }
    break;
  default :
    break;
  }
  return 0x00;
}