C++ :

#include<iostream>
#include<cstring>
#include<algorithm>
#include<cmath>
bool zhishu(int);
using namespace std;
bool zhishu(int d)
{
	int x=2;
	while(x<=sqrt(d)&&d%x!=0) x++;
	if(x>sqrt(d)) return 1;
	else return 0;
}


int main()
{
	string s;
	cin>>s;
	int a[100];
	int w=-1;
	int L=s.size(),ans=0;
	for(int i=0;i<=L-1;i++)
	 {
	  w++;
	     
	   for(int j=0;j<=L-1;j++)
	      	
	     if(s[i]==s[j])	  	 
		     ans++;           	    
	   
	   a[w]=ans;
	  
	   ans=0;
     }
     
	sort(a+0,a+w+1,less<int>());
	if(a[w]==a[0]||a[w]-a[0]==1)
	{
	 cout<<"No Answer"<<endl<<0;
	 return 0;
    }
	if(zhishu(a[w]-a[0])==1)
	{
	
	 cout<<"Lucky Word"<<endl<<a[w]-a[0];
	 return 0;
    }
	else
	{
	
	 cout<<"No Answer"<<endl<<'0';
	 return 0;
    }
}