HOJ ( acm.hdu.edu.cn ) 1283

#include<iostream>
using namespace std;
int main()
{
   char cmd[201];
   long M1,M2;
   for(;cin>>M1>>M2;)
   {
       long R1=0,R2=0,R3=0;
       cin>>cmd;
       for(int i=0;cmd[i];i++)
       {
           switch(cmd[i])
           {
               case 'A':R1=M1;break;
               case 'B':R2=M2;break;
               case 'C':M1=R3;break;
               case 'D':M2=R3;break;
               case 'E':R3=R1+R2;break;
               case 'F':R3=R1-R2;break;
               default:
                   return 1;
           }
       }
       cout<<M1<<','<<M2<<endl;
   }
   return 0;
}