#include <iostream>
#include <string>
using namespace std;
typedef long long int ll;

int main(){
	ll x,y,z; cin >> x >> y >> z;
	char s1,s2; ll t1,t2;
	cin >> s1 >> t1 >> s2 >> t2;
	if(s1==s2&&s1=='A'){
		if(t1>t2)swap(t1,t2);
		cout << min(t1-t2+x+z,min(t1+y+x-t2,t2-t1)) << endl;
	}
	if(s1==s2&&s1=='B'){
		if(t1>t2)swap(t1,t2);
		cout << min(t1-t2+y+z,min(t1+y+x-t2,t2-t1)) << endl;
	}
	if(s1==s2&&s1=='C'){
		if(t1>t2)swap(t1,t2);
		cout << min(t1-t2+y+z,min(t1+z+x-t2,t2-t1)) << endl;
	}
	if(s1>s2){
		swap(s1,s2);
		swap(t1,t2);
	}
	if(s1=='A'&&s2=='B'){
		cout << min(t1-1+t2,min(t1+z+y-t2,min(x-t1+y-t2+1,x-t1+z+t2))) << endl;
	}
	if(s1=='B'&&s2=='C'){
		cout << min(t1-1+t2,min(t1+x+z-t2,min(y-t1+z-t2+1,y-t1+x+t2))) << endl;
	}
	if(s1=='A'&&s2=='C'){
		cout << min(t1-1+t2,min(t1+y+z-t2,min(x-t1+z-t2+1,x-t1+y+t2))) << endl;
	}
}