#include<iostream>
#include<algorithm>
using namespace std;
long x,y,z;
main()
{
	char s,t;
	long S,T;
	cin>>x>>y>>z>>s>>S>>t>>T;
	long ans,inf=1e9;
	long ss=s=='A'?x:s=='B'?y:z;
	long tt=t=='A'?x:s=='B'?y:z;
	if(s==t)ans=min(abs(T-S),min({s=='A'?inf:x,s=='B'?inf:y,s=='C'?inf:z})+ss-abs(T-S));
	else ans=min(S+min(T-1,x+y+z-ss-T),ss-S+min(tt-T+1,T+x+y+z-ss-tt));
	cout<<ans<<endl;
}