#include<bits/stdc++.h>
using namespace std;
char aa[1010];
int cishu[27];
bool su(int n)
{
	if(n<2)
		return false;
	else{for(int i=2;i<=sqrt(n);++i)
	{
	if(n%i==0)
		return false;
	}}
	return true;
}
int main()
{
	freopen("word.in","r",stdin);
	freopen("word.out","w",stdout);
	int l,i,a,b;
	scanf("%s",&aa);
	l=strlen(aa);
	for(int i=0;i<=l-1;i++)
		cishu[aa[i]]++;
	a=0;
	b=aa[0];
	for(int i=1;i<=l-1;i++)
	{	if(cishu[aa[i]]>a)
				a=cishu[aa[i]];
		if(cishu[aa[i]]<b)
				b=cishu[aa[i]];}
	if(su(a-b))
		cout<<"Lucky Word"<<endl<<a-b;
	else
		cout<<"No Answer"<<endl<<0;
	return 0;
}