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[AtCoder]ABC-066|B - ss
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提出結果
def getString():
return input()
def main():
s = list(getString())
for i in range(len(s) - 1):
s.pop(-1)
l = len(s)
if l % 2 == 1:
continue
if s[:int(l / 2)] == s[int(l / 2) * -1:]:
print(l)
break
if __name__ == "__main__":
main()
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