x,y,z = map(int, input().split())
S0,t0 = map(str, input().split())
S1,t1 = map(str, input().split())
t0 = int(t0)
t1 = int(t1)

if S0 == S1:
    if t0 > t1:
        t0, t1 = t1, t0
    if S0 == "A":
        ans = min(t1-t0, t0+y+x-t1, t0+z+x-t1)
    elif S0 == "B":
        ans = min(t1-t0, t0+y+x-t1, t0+z+y-t1)
    else:
        ans = min(t1-t0, t0+y+z-t1, t0+z+x-t1)
else:
    if S0 == "A" and S1 == "B":
        ans = min(t0+t1-1, x-t0+1+y-t1, t0+z+y-t1)
    elif S0 == "A":
        ans = min(t0+t1-1, x-t0+1+z-t1, t0+z+y-t1)
    elif S0 == "B" and S1 == "A":
        ans = min(t0+t1-1, x-t0+1+y-t1, t1+z+y-t0)
    elif S0 == "B":
        ans = min(t0+t1-1, z-t0+1+y-t1, t1+x+y-t0)
    elif S0 == "C" and S1 == "A":
        ans = min(t0+t1-1, x-t0+1+z-t1, t1+z+y-t0)
    else:
        ans = min(t0+t1-1, z-t0+1+y-t1, t0+x+y-t1)
print(ans)