#include<bits/stdc++.h>
#define jiasu ios::sync_with_stdio(0);cin.tie(0);
#define jdsr for(int i=0;i<n;i++)  cin>>a[i];
using namespace std;
char s[105]; 
int maxn=-1,minn=1e9,a[205];
bool IsPrime(int n){
	if(n<=1){ 
		return false;
	}
    for(int i=2;i<n;i++){
        if(n%i==0){
            return false;
        }
    }
    return true;
}
signed main(){
//  freopen(".in","r",stdin);
//  freopen(".out","w",stdout);
	jiasu;
	cin>>s;
	int len=strlen(s);
	for(int i=0;i<len;i++){
		int x=int(s[i]);
		a[x]++;
	}
	for(int i=97;i<=122;i++){
		if(a[i]>maxn){
			maxn=a[i];
		}else if(a[i]<minn){
			minn=a[i];
		}
	}
	int t=maxn-minn;
	if(IsPrime(t)==true){
		cout<<"Lucky Word"<<"\n"<<t;
	}else{
		cout<<"No Answer"<<"\n"<<0;
	}
	return 0;
}