bojorenubo2.kt

interface BooBoo {
    fun sayBoo(): String
}

data class Tanon(val char: String) : BooBoo {
    override fun sayBoo(): String = char
}

data class Choon(val char: String) : BooBoo {
    override fun sayBoo(): String = char + "ー"
}

fun main() {
    val chars = listOf("ボ", "ジョ", "レ", "ヌ", "ボ")
    val shuffled = chars.shuffled()
    val tanons = shuffled.take(2).map {Tanon(it)}
    val choons = shuffled.drop(2).map {Choon(it)}
    val booBoos = tanons + choons
    
    println(booBoos.map {it.sayBoo()}.joinToString(""))
}