#include<bits/stdc++.h>
using namespace std;

char a;
int vis[30];
bool judge(int n) {
	if(n <= 1) return 0;
	for(int i = 2; i <= sqrt(n); ++i)
		if(!(n % i)) return 0;
	return 1;
}
int maxn = 0;
int minn = 999, cnt = 0;

int main() {
    while(cin >> a){
        vis[a - 'a']++;
        cnt++;
    }
    for(int i = 1; i <= 30; i++){
        if(vis[i] != 0){
            maxn = max(maxn, vis[i]);
            minn = min(minn, vis[i]);
        }
    }
	if(!judge(maxn - minn))
		printf("No Answer\n0\n");
	else{
        printf("Lucky Word\n%d\n", maxn - minn);
    }
		
	return 0;
}