package main

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

func main() {
	const numOfPlayers = 2
	var players [numOfPlayers]*player
	sc := NewScanner(os.Stdin)
	for i := 0; i < numOfPlayers; i++ {
		name, _ := sc.Next()
		points, _ := sc.Next()
		sc.Next()
		players[i] = NewPlayer(name, points)
	}

	fmt.Println(solve(players[0], players[1]))
}

func solve(a, b *player) string {
	switch {
	case len(a.points) > len(b.points):
		return a.name
	case len(a.points) < len(b.points):
		return b.name
	default:
		switch {
		case a.points > b.points:
			return a.name
		case a.points < b.points:
			return b.name
		default:
			return "-1"
		}
	}
}

type player struct {
	name   string
	points string
}

func NewPlayer(name string, points string) *player {
	return &player{
		name,
		points,
	}
}

type scanner struct {
	*bufio.Scanner
}

func NewScanner(r io.Reader) *scanner {
	return &scanner{
		bufio.NewScanner(r),
	}
}

func (s *scanner) Next() (string, error) {
	s.Scanner.Split(bufio.ScanWords)
	return s.nextToken()
}

func (s *scanner) nextToken() (string, error) {
	sc := s.Scanner
	if sc.Scan() {
		return sc.Text(), nil
	}
	if sc.Err() != nil {
		return "", sc.Err()
	}
	return "", io.EOF
}

func (s *scanner) NextInt() (int, error) {
	token, err := s.Next()
	if err != nil {
		return 0, err
	}
	return strconv.Atoi(token)
}