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[¸í»ç] permutation
µî±Þ :
SAT
´Ü¾î : permutation
¶æ : ¼ø¿. (¼ø¼ÀÇ) º¯È¯, ġȯ
¶æ(¿µ¾î) : Reciprocal change, different ordering of same items