#include<bits/stdc++.h>
using namespace std;
map<char, int> mp;  
bool f (int n){
	if(n == 1 || n == 0){
		return false;
	}
	for(int i=2;i<=sqrt(n);i++){
		if(n%i == 0){
			return false;
		}
	}
	return true;
}
int main(){
	int maxn = -0x3f3f3f3f;
	int minn = 0x3f3f3f3f;
    string s;
    cin >> s;
    for(int i = 0; i < s.size()+1; i++){
        mp[s[i]]++;
        maxn = max(maxn,mp[s[i]]);
        minn = min(minn,mp[s[i]]);
		  
    }
    int op = maxn - minn;
    if(f(op)){
    	cout<<"Lucky Word\n"<<op;
	}else{
		cout<<"No Answer\n0";
	}
    return 0;
}