#include<string>
#include<iostream>
using namespace std;
int v[26];
int maxx,minn=101;
int zhishu[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 main(){
	string s;
	cin>>s;
	for(int i=0;i<s.size();i++){
		v[s[i]-'a']++;
	}
	for(int i=0;i<26;i++){
		if(v[i]>maxx){
			maxx=v[i];
		}
		if(v[i]>0&&v[i]<minn){
			minn=v[i];
		}
	}
	for(int i=0;i<26;i++){
		if(maxx-minn==zhishu[i]){
			cout<<"Lucky Word"<<endl<<maxx-minn;
			return 0;
		}
	}
	cout<<"No Answer"<<endl<<"0";
}