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- fun gcdOfStrings(str1: String, str2: String): String {
- return when {
- str2.length > str1.length -> gcdOfStrings(str2, str1)
- str2 == str1 -> str1
- str1.startsWith(str2) -> gcdOfStrings(str1.substring(str2.length), str2)
- else -> ""
- }
- }
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