package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd:=bf.NewReader(Stdin)
	var n,m int
	Fscan(rd,&n,&m)
	graph := make([][]int, n+1)
	for ; m > 0; m-- {
		var u,v int
		Fscan(rd,&u,&v)
		graph[u] = append(graph[u], v)
	}
	path := make([]bool, n+1)
	res := make([]int, n+1)
	var dfs func(i int) int
	dfs = func(i int) int {
		if path[i] {
			return 2
		}
		if res[i] > 0 {
			return res[i]
		}
		path[i] = true
		res[i]= 1
		for _, x := range graph[i] {
			res[i] = max(res[i], 4 - dfs(x))
		}
		path[i] = false
		return res[i]
	}
	switch dfs(1) {
		case 1:
			Println("Bob")
		case 2:
			Println("Draw")
		case 3:
			Println("Alice")
	}	
}