baekjoon_10814.kts

import java.io.*
import java.util.*

fun main() = with(Scanner(System.`in`)){
    var n = nextInt()
    var list= arrayListOf<Pair<Int,String>>()

    for(i in 0 until n){
        list.add(Pair(nextInt(),nextLine()))
    }

    var sortList = list.sortedWith(compareBy({it.first}))

    for(i in 0 until n) {
        println("${sortList[i].first}${sortList[i].second}")
    }
}
main()