#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;

	Int ans = 1e18;
	if (s0 == s1) { ans = abs(t0 - t1); }

	Int t = 0;
	for (char i = 'A'; i <= 'C'; ++i) {
		if (i != s0 && i != s1) { t = d[int(i - 'A')]; }
	}
	Int l0 = t0, r0 = abs(d[int(s0 - 'A')] - t0) + 1;
	Int l1 = t1 - 1, r1 = abs(d[int(s1 - 'A')] - t1);
	ans = min({ans, l0 + l1, r0 + r1});
	ans = min({ans, l0 + t + r1, r0 + t + l1});
	cout << ans << endl;

	return 0;
}