#include<bits/stdc++.h>
using namespace std;
string s;
int a[27],len,maxn=1,minn=100;
bool f(int x){
    if(x<2){
        return false;
    }
    for(int i=2;i*i<=x;i++){
        if(x%i==0){
            return false;
        }
    }
    return true;
}
int main(){
    cin>>s;
    len=s.length();
    for(int i=0;i<len;i++){
        a[(int)(s[i]-'a'+1)]++;
    }
    for(int i=1;i<=26;i++){
        if(a[i]!=0){
            maxn=max(maxn,a[i]);
            minn=min(minn,a[i]);
        }
    }
    if(f(maxn-minn)){
        cout<<"Lucky Word\n"<<maxn-minn;
    }
    else{
        cout<<"No Answer\n0";
    }
    return 0;
}