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そのバイナリ形式をこれに変換する方法[<<"xys">>,<<"est">>] -> [<<"xys","est">>].
[<<"xys">>,<<"est">>] -> [<<"xys","est">>].
[<<"xys","est">>] は [<<"xysest">>] と同じなので、次のことができます。
1> [A,B] = [<<"xys">>,<<"est">>]. [<<"xys">>,<<"est">>] 2> [<<A/binary, B/binary>>]. [<<"xysest">>]