#include <bits/stdc++.h>
#define Int int64_t

using namespace std;

int main() {
	Int d[3];
	for (int i = 0; i < 3; ++i) { cin >> d[i]; }
	char s0, s1;
	Int t0, t1;
	cin >> s0 >> t0;
	cin >> s1 >> t1;

	if (s0 == s1) {
		cout << abs(t0 - t1) << endl;
		return 0;
	}

	char s2;
	for (char i = 'A'; i <= 'C'; ++i) {
		if (i != s0 && i != s1) { s2 = i; }
	}
	Int l0 = t0, r0 = abs(d[int(s0 - 'A')] - t0) + 1;
	Int l1 = t1 - 1, r1 = abs(d[int(s1 - 'A')] - t1);
	Int ans = min(l0 + l1, r0 + r1);
	ans = min({ans, l0 + d[int(s2 - 'A')] + r1, r0 + d[int(s2 - 'A')] + l1});
	cout << ans << endl;

	return 0;
}