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[AtCoder]ABC-276|A - Rightmost
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提出結果
def getString():
return input()
def main():
s = list(getString())
s.reverse()
print(len(s) - s.index('a') if 'a' in s else -1)
if __name__ == "__main__":
main()
def getString():
return input()
def main():
s = list(getString())
s.reverse()
print(len(s) - s.index('a') if 'a' in s else -1)
if __name__ == "__main__":
main()
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