#include<bits/stdc++.h>
using namespace std;
int a[27];
int prime[100]={-1,2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101};
int isprime(int d){
	for(int i=1;i<=25;i++){
		if(d==prime[i])return true;
	}
	return false;
}
int main(){
	char t;
	int mx=-1,mn=101;cin>>t;
	while(t>96&&t<123){
		a[t-96]++;
		cin>>t;
	}
	for(int i=1;i<=26;i++){
		if(a[i]>mx)mx=a[i];
		if(a[i]<mn&&a[i])mn=a[i];
	}
	if(isprime(mx-mn)){
		cout<<"Lucky Word\n"<<mx-mn;
	}
	else cout<<"No Answer\n0";
}