#include<iostream>
#include<cstdio>


using namespace std;
int is_prime(int n)
{
	for(int i=2;i*i<=n;i++){
		if(n%i==0)	return 0;
		return 1;
	}
}
int main()
{
	freopen("word.in","r",stdin);
	freopen("word.out","w",stdout);
	char word[40],tmp;
	short max=0,min=100,ans;
	for(int i=0;i<40;i++)
	{
		word[i]=0;
	}
	
	while(scanf("%c",&tmp)!=EOF)//word个数 
	{
		word[tmp-'a']++;
		
	}
	for(int i=0;i<40;i++)
	{
		if(word[i]>max)
		{
			max=word[i];
		}
		if(word[i]>0&&word[i]<min)
		{
			min=word[i];
		}
	}
	ans=max-min;
	if(is_prime(ans))
	{
		cout<<"Lucky Word"<<endl<<ans<<endl;
	}
	else
	{
		cout<<"No Answer"<<endl<<'0'<<endl;
	}
	return 0;
	
}