#include<bits/stdc++.h>
using namespace std;
string s;
int main(){
	int z[25]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97};
	int l,minn=1e9,mixx=-1,a[150];
	cin>>s;
	l=s.length();
	for(int i=0;i<l;i++){
		a[s[i]]++;
	}sort(a+0,a+l);
	mixx=a[l-1];
	minn=a[0];
	for(int i=0;i<25;i++){
		if(mixx-minn==z[i]){
			cout<<"Lucky Word\n"<<mixx-minn;
			return 0;
		}
	}cout<<"No Answer\n"<<0;
	return 0;
}