#include<bits/stdc++.h>
const int N=1e5+10;
const int INF=0x3f3f3f3f;
using namespace std;
int Accepted(int x){
	if(x<2) return 0;
	for(int i=2;i<x;i++){
		if(x%i==0){
			return 0;
		}
	}
	return 1;
}
int main(){
	string a;
	int s[N]={},maxx=-INF,minn=INF;
	cin>>a;
	for(int i=0;i<a.size();i++)
	{
		s[a[i]]++;
	}
	for(int i='a';i<='z';i++)
	{
		maxx=max(maxx,s[i]);
		if(s[i]!=0){
			minn=min(minn,s[i]);
		}
	}
	int ans=maxx-minn;
	if(Accepted(ans))
		cout<< "Lucky Word" << endl << ans;
	else
	 cout<<"No Answer"<<endl<<0;
	return 0;
}