#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

const ll MX = (1<<20);

int arr[MX];

int T , n , m;

char ccc[500];

int main(){

    scanf("%d",&T);
    while(T--){
        scanf("%d %d",&n,&m);
        int weak = 0 , invalid = 0;
        while(n--){
            string str , tests;
            scanf("%s",ccc); str = ccc;
            scanf("%s",ccc); tests = ccc;
            int zeroes = 0 , ones = 0;
            for(auto ch : tests)
                if(ch == '0') ++zeroes;
            else ++ones;
            if(str == "correct"){
                if(ones != tests.size())
                    invalid = 1;
            }
            if(str == "wrong"){
                if(zeroes == 0)
                    weak = 1;
            }
        }
        if(invalid) puts("INVALID");
        else if(weak) puts("WEAK");
        else puts("FINE");
    }
}