#include<bits/stdc++.h>
using namespace std;
int main(){float l=0;
	int n=0,m=0,a[30];
	char b[101];
	cin>>b;
	for(int i=0;i<strlen(b);i++){
	
	a[int(b[i])-'a']++;
}
	for(int i=0;i<strlen(b);i++){
	if(a[i]>n)
	n=a[i];
	if(a[i]<m)
	m=a[i];
	}l=sqrt(n-m);
	if(l!=int(l)){
	cout<<"Lucky Word"<<endl;
	cout<<n-m;
	}
	else {

	cout<<"No Answer";	
	cout<<0;}
return 0;}