CodingBat conCat2

conCat2

String conCat2(String a, String b): Returns a concatenation of the two strings. The shorter string will PRECEDE the longer string. If the strings are the same length, return b + a;

conCat2("abc", "XYZ") → "XYZabc"
conCat2("Help", "Nobody") → "HelpNobody"
conCat2("0123456789", "ABCDEFG") → "ABCDEFG0123456789"

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