a, b, c = map(int,input().split())
S = input().split()
s = int(S[1]); x = S[0]
G = input().split()
g = int(G[1]); y = G[0]

if x == y:
    if s > g:
        s, g = g, s
    if x == 'B':
        a, b = b, a
    elif x == 'C':
        a, b, c = c, b, a
    z = min(g-s, s+c+a-g, s+b+a-g)

else:
    if x == 'A' and y == 'B':
        b, c = c, b
    elif x == 'B' and y == 'A':
        a, b, c = b, c, a
    elif x == 'B' and y == 'C':
        a, b  = b, a
    elif x == 'C' and y == 'A':
        a, b, c = c, b, a
    elif x == 'C' and y == 'B':
        a, b, c = c, a, b
    z = min(s+g-1, a-s+c-g+1, a-s+b+g, s+b+c-g)

print(z)