#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
	vector<int> x(3);
	cin >> x[0] >> x[1] >> x[2];
	char S0, S1; int t0, t1;
	cin >> S0 >> t0 >> S1 >> t1;

	auto Inter = [=](bool i, char S, int t) {
		return i ? t : x[S - 'A'] - t + 1;
	};

	int Xmin = min({ x[0],x[1],x[2] }) - 1;
	cout << min({
		S0 == S1 ? abs(t0 - t1) : (int)2e9,
		Inter(1, S0, t0) + Inter(1, S1, t1) - 1, Inter(0, S0, t0) + Inter(0, S1, t1) - 1,
		Inter(1, S0, t0) + Xmin + Inter(0, S1, t1), Inter(0, S0, t0) + Xmin + Inter(2, S1, t1),
		}) << endl;
}