CodingBat comboString2

comboString2

Given 2 strings, a and b, return a string of the form long+short+long, with the shorter string on the inside and the longer string on the outside. The strings will not be the same length, but they may be empty (length 0).

comboString2("Hello", "hi") → "HellohiHello"
comboString2("hi", "Hello") → "HellohiHello"
comboString2("aaa", "b") → "aaabaaa"

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Difficulty: 10

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