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

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