#include<bits/stdc++.h>
using namespace std;
string s;
int a[1005] = {0};
bool op(int number)
{
	if(number == 1 || number == 0) return 0;
	if(number == 2) return 1;
	for(int i=2; i*i<=number; i++)
	{
		if(number % i == 0)
		{
			return 0;
		}
	}
	return 1;
}
int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	cin >> s;
//	int h = 0;
	int len = s.size();
	for(int i=0; i<len; i++)
	{
		a[s[i]]++;
//		h++;
	}
	int maxa = 0,mina = INT_MAX;
	for(int i='a'; i<='z'; i++)
	{
		if(a[i] < mina) mina = a[i];
		if(a[i] > maxa) maxa = a[i];
	}
//	cout << maxa << " " << mina << endl;
	if(op(maxa-mina) == 1) cout << "Lucky Word" << endl << maxa-mina;
	else if(op(maxa-mina) == 0) cout << "No Answer" << endl << maxa-mina;
	return 0;
}