#include<bits/stdc++.h>
using namespace std;
int word[27];
bool zhishu(int a){
	if(a==0||a==1) return false;
	for(int i=2;i<=sqrt(a);i++){
		if(a%i==0)return false;}
	return true;}
int main(){
	string ans;
	cin>>ans;
	int len=ans.length(),maxx=0,minn=0x3f3f3f3f;
	for(int i=1;i<=len;i++) word[ans[i-1]-96]++;
	for(int i=1;i<=26;i++){
		if(word[i]>maxx) maxx=word[i];
		if(word[i]<minn&&word[i]) minn=word[i];}
	bool lucky=zhishu(maxx-minn);
	if(lucky==true) cout<<"Lucky Word\n";
	else cout<<"No Answer\n";
	cout<<maxx-minn;
	return 0;
}