> #include "Stdio.h"
> char flag;
> char answer()
>   { int letter[12][4]={0};
>     int i,ii,a,b,tmp;
>     char s1[4],s2[4],s[4],cmp[3];
>    for(i=0;i<3;i++)
>       {
>        scanf("%s %s %s",s1,s2,s);
>        cmp[i]=s[0];
>        for(ii=0;ii<4;ii++)
>            {
>             letter[s1[ii]-'A'][i]=1;
>             letter[s2[ii]-'A'][i]=2;
>             if(cmp[i]=='e')
>                {
>                letter[s1[ii]-'A'][3]=1;
>                letter[s2[ii]-'A'][3]=1;
>                }
>             }
>       }
> 
>  for(flag=0;flag<2;flag++)
>    {
>     for(i=0;i<12;i++)
>        {
>          if(letter[i][3]==0)
>            {
>             tmp=1;
>             switch(flag)
>               {
>                 case 1:for(ii=0;(ii<3)&&(tmp);ii++)
>                          {
>                          if(cmp[ii]=='u'&&letter[i][ii]!=2) tmp=0;
>                          if(cmp[ii]=='d'&&letter[i][ii]!=1) tmp=0;
>                          }
>                        break;
>                 case 0:for(ii=0;(ii<3)&&(tmp);ii++)
>                          {
>                          if(cmp[ii]=='d'&&letter[i][ii]!=2) tmp=0;
>                          if(cmp[ii]=='u'&&letter[i][ii]!=1) tmp=0;
>                          }
>                        break;
>                }
>             if(tmp) return((char)i+'A');
>             }
>         }
>    }
> }
> main()
> {
>  int n;
>  scanf("%d",&n);
>  while(n--)
>     {
>      printf("%c is the counterfeit coin and it is ",answer());
>      printf(flag? "light.\n":"heavy.\n");
>      }
> }