/* Find hash function to transform letters to punctuations. */

#include<stdio.h>

int main(int argc, char **argv)
{
   int mul, x, mod, coverage, pass, i, o;

   (void)argc;
   (void)argv;

   for(mul = 1; mul < 256; mul++)
   {
      for(x = 0; x < 256; x++)
      {
         for(mod = ',' + 1; mod < 256; mod++)
         {
            coverage = 0;
            for(pass = 0; pass < 2; pass++)
            {
               for(i = 'J'; i <= 'S'; i++)
               {
                  if( i == 'O' )
                     continue;

                  o = (i * mul ^ x) % mod;
                  if( o == ' ' )
                  {
                     if( pass == 0 )
                        coverage |= 1;
                     else
                        printf("%c (%d) -> space (%d)\n", i, i, o);
                  }
                  else if( o == '\n' )
                  {
                     if( pass == 0 )
                        coverage |= 2;
                     else
                        printf("%c (%d) -> \\n (%d)\n", i, i, o);
                  }
                  else if( o == '$' )
                  {
                     if( pass == 0 )
                        coverage |= 4;
                     else
                        printf("%c (%d) -> $ (%d)\n", i, i, o);
                  }
                  else if( o == ',' )
                  {
                     if( pass == 0 )
                        coverage |= 8;
                     else
                        printf("%c (%d) -> , (%d)\n", i, i, o);
                  }
                  else if( o == '\"' )
                  {
                     if( pass == 0 )
                        coverage |= 16;
                     else
                        printf("%c (%d) -> \" (%d)\n", i, i, o);
                  }
                  else if( o == '#' )
                  {
                     if( pass == 0 )
                        coverage |= 32;
                     else
                        printf("%c (%d) -> # (%d)\n", i, i, o);
                  }
               }
               if( pass == 0 )
               {
                  if( coverage != 63 )
                     break;
                  printf("mul = %d, x = %d, mod = %d\n", mul, x, mod);
               }
            }
         }
      }
   }
   return 0;
}