#include<bits/stdc++.h>
using namespace std;
bool sh(int y)
{
	if(y==1)return false;
	if(y==2)return true;
	for(int i=2;i*i<=y;i++)
		if(y%i==0)return false;
	return true;
}
int main()
{
	int max=0,min=101,d,z[27]={0},k=0;
	string a;
	cin>>a;
	for(int i=0;i<=a.size();i++)
	{
		z[a[i]-'a']++;
	}
	for(int i=0;i<=26;i++)
	{
		//cout<<z[i]<<"\n";
		if(z[i]>max)
		{
			max=z[i];
		}
		if(z[i]<min&&z[i]!=0)
		{
			min=z[i];
		}
	}
	if(max==min)
	{
		if(sh(max))
		{
			cout<<"Lucky Word\n";
		}
		else
		{
			cout<<"No Answer\n";
		}
		cout<<max;
	}
	else
	{
		if(sh(max-min))
		{
		cout<<"Lucky Word\n";
		}
		else
		{
			cout<<"No Answer\n";
		}
		cout<<max-min;
	}
	return 0;
}