inf = float("inf")
G = [[inf] * 8 for _ in range(8)]  # a0,ax,b0,by,c0,cz,s,t

xyz = list(map(int, input().split()))
for i in range(3):
    G[2*i][2*i+1] = G[2*i+1][2*i] = xyz[i] - 1
    for j in range(3):
        if i != j:
            G[2*i][2*j] = 1
            G[2*i+1][2*j+1] = 1

s, x = input().split()
t, y = input().split()
d = {"A": 0, "B": 1, "C": 2}

x = int(x) - 1
y = int(y) - 1

if s == t:
    G[6][7] = abs(x - y)
i = d[s]
G[6][2*i] = x
G[6][2*i+1] = xyz[i] - x - 1
i = d[t]
G[2*i][7] = y
G[2*i+1][7] = xyz[i] - y - 1
for k in range(8):
    for i in range(8):
        for j in range(8):
            G[i][j] = min(G[i][j], G[i][k] + G[k][j])
print(G[6][7])