#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
int ans,flag[300],ma,mi;
bool check(int ce)
{
	if(ce==1||ce==0)return false;
	for(int i=2;i*i<=ce;i++)
	if(ce%i==0)return false;
	return true;
}
int a[300];
char wo[300];
int main()
{
	freopen("word.in","r",stdin);
	freopen("word.out","w",stdout);
	cin.get(wo,300);
	for(int i=0;i<strlen(wo);i++)
	{
		a[wo[i]]++;
		flag[wo[i]]++;
	 }
	 mi=1000;
	for(int i=97;i<=122;i++)
	if(flag[i])
	{
		mi=min(a[i],mi);
		ma=max(a[i],ma);
	  } 
//	cout<<ma<<"  "<<mi<<endl; 
	if(check(ma-mi)){
		printf("Lucky Word\n%d",ma-mi);
	}   
	else printf("No Answer\n0");
	return 0;
}