import java.util.Scanner

var input = Scanner(System. `in`)

fun inputHeightAndWeight(heightMap: MutableMap<String, IntArray>){
	heightMap["A"] = intArrayOf(input.nextInt(), input.nextInt())
	heightMap["B"] = intArrayOf(input.nextInt(), input.nextInt())
	heightMap["C"] = intArrayOf(input.nextInt(), input.nextInt())
	sort(heightMap)
}

fun sort(heightMap: MutableMap<String, IntArray>){
	var weightSort: Map<String, IntArray> = heightMap.toList().sortedBy{ (_, value) -> value[1] }.toMap()
	var heightSort: Map<String, IntArray> = weightSort.toList().sortedBy{ (_, value) -> -value[0] }.toMap()
	heightSort.forEach{ println(it.key) }
}

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