x, y, z = map(int, input().split())
ss = input().split()
tt = input().split()
ss[1] = int(ss[1])
tt[1] = int(tt[1])

if ss[0] == tt[0]:
    if ss[1] > tt[1]:
        ss, tt = tt, ss
    ans = tt[1] - ss[1]
    tmp = ss[1] - tt[1]
    if ss[0] == "A":
        tmp += x + min(y, z)
    elif ss[0] == "B":
        tmp += y + min(x, z)
    else:
        tmp += z + min(x, y)
    ans = min(ans, tmp)

else:
    ans = ss[1] + tt[1] - 1
    for a in (ss, tt):
        if a[0] == "A":
            a.append(x - a[1])
        elif a[0] == "B":
            a.append(y - a[1])
        else:
            a.append(z - a[1])
    ans = min(ans, ss[2] + tt[2] + 1)
    tmp = min(ss[1] + tt[2], ss[2] + tt[1])
    if "A" not in [ss[0], tt[0]]:
        tmp += x
    elif "B" not in [ss[0], tt[0]]:
        tmp += y
    else:
        tmp += z
    ans = min(ans, tmp)
print(ans)