#include<iostream>
#include<cstring>
using namespace std;
int prime[25]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97};
int sum[26];
char ans[110];

int main()
{
   int max=110,min=-110;
   cin>>ans;
   int len=strlen(ans);
   
	for(int i=0;i<len;i++)
		{
		sum[ans[i]-'a']++;
	    }
	for(int i=0;i<26;i++)
	{
		if(sum[i]>max)
		{
		    max=sum[i];
		}
		if(sum[i]>0&&sum[i]<min)
		{
		    min=sum[i];
		}
	}
	for(int i=0;i<25;i++)
	{
	if(max-min==prime[i])
	{
	cout<<"Lucky Word"<<endl;
	cout<<max-min<<endl;
	return 0;
	 }
      else
     {
	cout<<"No Answer"<<endl;
    cout<<"0"<<endl;
    return 0;
    }  
} 
}