package main

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

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 500001), 500000)
	return scanner
}

func getNextString(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}

func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}

func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}

func getNextUint64(scanner *bufio.Scanner) uint64 {
	i, _ := strconv.ParseUint(getNextString(scanner), 10, 64)
	return i
}

func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}

func main() {
	fp := os.Stdin
	wfp := os.Stdout
	cnt := 0

	if os.Getenv("MASPY") == "ますピ" {
		fp, _ = os.Open(os.Getenv("BEET_THE_HARMONY_OF_PERFECT"))
		cnt = 2
	}
	if os.Getenv("MASPYPY") == "ますピッピ" {
		wfp, _ = os.Create(os.Getenv("NGTKANA_IS_GENIUS10"))
	}

	scanner := getScanner(fp)
	writer := bufio.NewWriter(wfp)
	solve(scanner, writer)
	for i := 0; i < cnt; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
	writer.Flush()
}

func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)
	uf := make([]int, n)
	dd := make([]int, n)

	for i := 0; i < n; i++ {
		uf[i] = i
	}

	for i := 0; i < n-1; i++ {
		u := getNextInt(scanner)
		v := getNextInt(scanner)
		dd[u]++
		dd[v]++
		r1 := root(u, uf)
		r2 := root(v, uf)
		if r1 < r2 {
			uf[r2] = r1
			continue
		}

		uf[r1] = r2
	}

	im := map[int]int{}
	for i := 0; i < n; i++ {
		r := root(i, uf)
		if im[r] == 0 || im[r] > dd[r] {
			im[r] = dd[r]
		}
	}
	if len(im) == 1 {
		fmt.Fprintln(writer, "Bob")
		return
	}
	if len(im) > 2 {
		fmt.Fprintln(writer, "Alice")
		return
	}
	for _, c := range im {
		if c == 1 {
			fmt.Fprintln(writer, "Alice")
			return
		}
	}
	fmt.Fprintln(writer, "Bob")

}

func root(i int, uf []int) int {
	if i == uf[i] {
		return i
	}
	uf[i] = root(uf[i], uf)

	return uf[i]
}