#include <iostream>
using namespace std;
#define x34 min(a2,b2)
#define y34 max(a2,b2)
int main(){
  int a,b,c;cin>>a>>b>>c;
  char a1;int a2;cin>>a1>>a2;
  char b1;int b2;cin>>b1>>b2;
  if(a1==b1){
    if(a1=='A')cout << min(y34-x34,x34+(a-y34)+(min(c,b)+1)) << endl;
    if(a1=='B')cout << min(y34-x34,x34+(b-y34)+(min(a,c)+1)) << endl;
    if(a1=='C')cout << min(y34-x34,x34+(c-y34)+(min(a,b)+1)) << endl;
  }else{
    if(min(b2,a2)=='A'){
      if(max(b2,a2)=='B') cout << min(x34+y34-1,(a-x34)+(b-y34)) << endl;
      else cout << min(x34+y34-1,(a-x34)+(c-y34)) << endl;
    }else cout << min(x34+y34-1,(b-x34)+(c-y34)) << endl;
  }
}


//Ax->By 
//Ax->Cy m
//Bx->Cy