#include<iostream>
using namespace std;
typedef long long ll;
int no(int a,int b){
  if((a==0&&b==1)||(a==1&&b==0))return 2;
  if((a==0&&b==2)||(a==2&&b==0))return 1;
  return 0;
}
int main(){
  ll xyz[3],t0,i,t1,ml=100000000000000,n0,n1,outl,gf,ge;
  char s0,s1;
  cin >> xyz[0] >> xyz[1] >> xyz[2] >> s0>>t0>>s1>>t1;
  n0=s0-'A';
  n1=s1-'A';
  if(n0==n1){
    outl = min(t0,xyz[n0]-t0)+min(t1,xyz[n1]-t1)-2;
    ml = min(abs(t1-t0),outl+min(xyz[(n0+1)%3],xyz[(n0+2)%3]));
  }else{
    i = no(n0,n1);
    gf = min(t0-1,xyz[n0]-t0+xyz[i]);
    ge = min(xyz[n0]-t0-1,t0+xyz[i]);
    ml = min(gf+t1,ge+xyz[n1]-t1);
  }
  cout << ml<<endl;
}