package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func Scanner() string {
	sc.Scan()
	return sc.Text()
}

type person struct {
	n string
	h int
	w int
}

func main() {
	buf := make([]byte, 0)
	sc.Buffer(buf, 100000007)
	sc.Split(bufio.ScanWords)
	brothers := make([]person, 3)
	brothers[0].n = "A"
	brothers[1].n = "B"
	brothers[2].n = "C"
	for i := 0; i < 3; i++ {
		brothers[i].h, _ = strconv.Atoi(Scanner())
		brothers[i].w, _ = strconv.Atoi(Scanner())
	}
	sort.Slice(brothers, func(i, j int) bool {
		return brothers[i].h > brothers[j].h
	})

	sort.Slice(brothers, func(i, j int) bool {
		if brothers[i].h == brothers[j].h {
			return brothers[i].w < brothers[j].w
		} else {
			return false
		}
	})

	for i := 0; i < 3; i++ {
		fmt.Println(brothers[i].n)
	}
}