#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,x,y;
    cin>>a;
    x=23+27+a/3.0;
    y=a/1.2;
    if(x<y){
    	cout<<"Bike";
	}
	else if(x>y){
		cout<<"Walk";
	}
    return 0;
}