這道題的答案是什么?

旭5297137
2023-04-13
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2023-04-13
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2025-07-22
# Enter a code
s1 = '123'
s2 = 'ABC'
s3 = 'xyz'
for c in s1:
? ? for c2 in s2:
? ? ? ? for c3 in s3:
? ? ? ? ? ? print(c+c2+c3)