#include<iostream>
 
using namespace std;
int arr1[10000];int arr2[10000];
int main(){
	int tc;
	cin >> tc;
	while(tc--){
	    bool flag = false;
	    int x,y,k,n;
    	cin >> x >> y >> k >> n;
 
	    //rpage=x-y;
	    int i=0;
 
	    while(n--){
	     cin >> arr1[i] >> arr2[i];
	    //cout << arr1[i] << arr2[i];
	     i++;
	    }
 
 
	  for(int j=0;j<n;j++){
	    if(arr1[j]>=x-y && arr2[j]<=k){
	     flag = true;
	     break;
	 }
	}
 
 
	if(flag)
	   cout << "LuckyChef" << endl;
	else
	   cout << "UnluckyChef" <<endl;   
	}
	return 0;
}

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

MwozIDEgMiAyCjMgNAoyIDIgICAgCjMgMSAyIDMKMiAxCjIgMyAgICAKMSAxCjMgMSAyIDIKMSAxCjEgMg==

3
3 1 2 2
3 4
2 2    
3 1 2 3
2 1
2 3    
1 1
3 1 2 2
1 1
1 2