x, y, z = map(int, input().split())
s0, t0 = map(str, input().split())
s1, t1 = map(str, input().split())
t0 = int(t0)-1
t1 = int(t1)-1

L = [x, y, z]
s0 = ord(s0)-ord('A')
s1 = ord(s1)-ord('A')

INF = 10**18
ans = INF
if s0 == s1:
    if t0 > t1:
        t0, t1 = t1, t0
    ans = min(ans, abs(t0-t1))
    for i in range(3):
        if i == s0:
            continue
        ans = min(ans, t0+1+L[i]-1+L[s0]-t1)
else:
    ans = min(ans, t0+t1+1)
    ans = min(ans, L[s0]-1-t0+L[s1]-1-t1+1)
    for i in range(3):
        if i == s0 or i == s1:
            continue
        ans = min(ans, t0+1+L[i]-1+L[s1]-t1)
        ans = min(ans, t1+1+L[i]-1+L[s0]-t0)
print(ans)