#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
char a[101];
int word[27],len=0,maxn=0,minn=101,ans,i;
int is_prime(int a)
{
	if(a==0)return 0;
	for(int j=2;j*j<=a;j++)
	  if(a%j==0)return 0;
	return a!=1;
}
int Main()
{
	freopen("word.in","r",stdin);freopen("word.out","w",stdout);
	ios::sync_with_stdio(false);
	cin>>a;
	for(i=0;i<strlen(a);i++)
	  word[int(a[i])-96]++;
	for(i=1;i<=26;i++)
	{
		if(word[i]==0)continue;
		if(word[i]<minn)minn=word[i];
		if(word[i]>maxn)maxn=word[i];
	}
	ans=maxn-minn;
	if(is_prime(ans))
	  printf("Lucky Word\n%d",ans);
	else
	  printf("No Answer\n0");	
	return 0;
}
int main(){;};
int sjm=Main();