回答編集履歴
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追記
test
CHANGED
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@@ -5,3 +5,65 @@
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5
5
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6
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そして得られた各リストを str.join でくっつけてやれば良いです。
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追記
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---
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コードを書いている人がいるので、便乗。
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```Python
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from itertools import chain, permutations
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src = ['ABC', 'abc', '123']
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it = chain.from_iterable(
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permutations(src, l) for l in range(len(src)+1)[2:]
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)
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print(*map(''.join, it), sep='\n')
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```
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**実行結果** [Wandbox](https://wandbox.org/permlink/XvKnl1MKPowZc6Sy)
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```plain
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ABCabc
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ABC123
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abcABC
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abc123
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123ABC
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123abc
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ABCabc123
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ABC123abc
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abcABC123
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abc123ABC
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123ABCabc
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123abcABC
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```
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