#include<iostream>

 #include<stdio.h>

 #include<algorithm>

 #include<iomanip>

 #include<cmath>

 #include<cstring>

 #include<vector>

 #define ll __int64

 #define pi acos(-1.0)

 #define MAX 50000

 using namespace std;

 int n,m,t,j,ans;

 int main(){

     while(scanf("%d%d",&n,&m)!=EOF){

         ans=;

         for(int i=;i<n;i++){

             scanf("%d%d",&t,&j);

             ans^=abs(t-j)-;

         }

         puts(ans==?"BAD LUCK!":"I WIN!");

     }

     return ;

 }