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#include <bits/stdc++.h>
using namespace std;
int main() {
int n, m;
while (~scanf("%d %d", &n, &m)) {
int res = 0;
for (int i = 1; i <= n; ++i) {
int a, b;
scanf("%d %d", &a, &b);
// 两个棋子的距离的绝对值减1.因为我们看当两个棋子相邻的时候,
// 已经是一个必败态了。不信我贴着你,你走吧。你走一步我跟一步,最后你将无路路可走
res = res ^ (abs(a - b) - 1);
}
if (res == 0)
puts("BAD LUCK!");
else
puts("I WIN!");
}
return 0;
}