# include <algorithm>
# include <stdio.h>
# include <string.h>
# include <math.h>
# include <iostream>
using namespace std;
int main()
{
int n,m,i,a,b,cot;
while(~scanf("%d%d",&n,&m))
{
cot=0;
for(i=0; i<n; i++)
{
scanf("%d%d",&a,&b);
cot^=abs(abs(a-b)-1); // 把中间差的空格,即走的总步数,当作总石头数,
}
if(cot==0)//平衡状态,后手赢
printf("BAD LUCK!\n");
else
printf("I WIN!\n");
}
return 0;
}