import sys
sys.stdin = open("input.txt")
sys.setrecursionlimit(10 ** 8)
S = input()
T = input()
def main(goal, inp):
# print(inp)
if goal == inp:
print(1)
return
if len(inp) < len(goal):
print(0)
return
if inp[-1] == "A":
main(goal, inp[:-1])
if inp[-1] == "B":
main(goal, inp[:-1][::-1])
main(S, T)