import java.util.*

fun inputHeight(heightMap: MutableMap<String, Int>){
	var input = Scanner(System. `in`)
	heightMap["A"] = input.nextInt()
	heightMap["B"] = input.nextInt()
	heightMap["C"] = input.nextInt()
	sort(heightMap)
}

fun sort(heightMap: MutableMap<String, Int>){
	var mapKey = heightMap.toList().sortedBy{ (_, value) -> -value }.toMap()
	mapKey.forEach{ println(it.key) }
}

fun main(args: Array<String>){
	var heightMap: MutableMap<String, Int> = mutableMapOf()
	inputHeight(heightMap)
}