x, y, z = map(int, input().split())
S = input().split()
G = input().split()
p = int(S[1])
q = int(G[1])

P = 0
Q = 0
R = 0

F = 0

if S[0] == 'A' and G[0] == 'A':
    P = x - p
    Q = x - q
    R = min(y, z)
elif S[0] == 'A' and G[0] == 'B':
    P = x - p
    Q = y - q
    R = z
elif S[0] == 'A' and G[0] == 'C':
    P = x - p
    Q = z - q
    R = y
elif S[0] == 'B' and G[0] == 'A':
    P = y - p
    Q = x - q
    R = z
elif S[0] == 'B' and G[0] == 'B':
    P = y - p
    Q = y - q
    R = min(x,z)
elif S[0] == 'B' and G[0] == 'C':
    P = y - p
    Q = z - q
    R = x
elif S[0] == 'C' and G[0] == 'A':
    P = z - p
    Q = x - q
    R = y
elif S[0] == 'C' and G[0] == 'B':
    P = z - p
    Q = y - q
    R = x
elif S[0] == 'C' and G[0] == 'C':
    P = z - p
    Q = z - q
    R = min(x, y)

if S[0] == G[0]:
    if p <= q:
        F = min(q-p, p+R+Q)
    else:
        F = min(p-q, P+R+q)
else:
    F = abs(min(p+q-1, P+Q+1, p+R+Q, P+R+q))

print(F)