#!/usr/bin/env python3
x, y, z = map(int, input().split())
mp = {'A': x, 'B': y, 'C': z}
s0, t0 = input().split()
s1, t1 = input().split()
t0 = int(t0)
t1 = int(t1)
ans = 10**9
if s0 == s1:
    s1 = ''
    s2 = ''
    for i in range(3):
        if 'ABC'[i] == s0:
            continue
        s1 = 'ABC'[i]
    for i in range(3):
        if 'ABC'[i] == s0:
            continue
        if 'ABC'[i] == s1:
            continue
        s2 = 'ABC'[i]
    ans = min(ans, abs(t1 - t0))
    ans = min(ans, mp[s0] - abs(t1 - t0) + mp[s1])
    ans = min(ans, mp[s0] - abs(t1 - t0) + mp[s2])
else:
    s2 = ''
    for i in range(3):
        if 'ABC'[i] == s0:
            continue
        if 'ABC'[i] == s1:
            continue
        s2 = 'ABC'[i]
    ans = min(ans, t0 + t1 - 1)
    ans = min(ans, t0 + (mp[s1] - t1) + mp[s2])
    ans = min(ans, (mp[s0] - t0) + t1 + mp[s2])
    ans = min(ans, (mp[s0] - t0) + (mp[s1] - t1) + 1)
print(ans)