#include <iostream>
#include <string>
using namespace std;
int main()
{
	int maxn = -1, minn = 101, s[31] = {0};
	string a;
	cin >> a;
	for (int i = 0; i < a.size(); i++)
    {
		s[a[i] - 97]++;
	}
	for (int i = 0; i < 26; i++)
    {
		if (s[i] > maxn)
        {
			maxn = s[i];
		}
		if ((s[i] < minn) && (s[i] != 0))
        {
			minn = s[i];
		}	
	}
	if ((maxn - minn > 1) && (a[maxn - minn]))
    {
		cout << "Lucky Word" << endl << maxn - minn;
	}	
	else
    {
		cout << "No Answer" << endl << "0";
	}	
	return 0;
}

#include <bits/stdc++.h>
using namespace std;
string s;
int a[150],minn=INT_MAX,maxx=INT_MIN;
bool prime(int x){
    if (x<2)return 0;
    for (int i=2;i*i<=x;i++){
        if (x==i)return 0;
    }
    return 1;
}
int main(){
    cin>>s;
    for (int i=0;i<(int)s.size();i++)a[(int)s[i]]++;
    for (int i=97;i<=122;i++){
        if (a[i]!=0){
            maxx=max(a[i],maxx);
            minn=min(a[i],minn);
        }
    }
    if (prime(maxx-minn))cout<<"Lucky Word"<<endl<<maxx-minn;
    else cout<<"No Answer"<<endl<<0;
    return 0;
}