list1: $VAR1 = ['a','a','b','c','c','d','e','e','f'];
list2: $VAR1 = ['a','b','c','d','e','f'];
list3: $VAR1 = ['d','e','f','g','h','i'];
Same Lists: list1 and list2
Different Lists: list1 and list3

    Source: geocities.com/soho/square/Square/3472

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