#include<iostream>
#include<cstdio>
using namespace std;
int a[27];
int main()
{
	freopen("word.in","r",stdin);  
	freopen("word.out","w",stdout);
	char charu[29]="abcdefghijklmnopqrstuvwxyz";
	char chari[100];
	int i,j,min=100,max=0,cha,tmp=0,x=0;
	for(i=1;scanf("%c,&chari[i]")==0;i++)
	{
		for(j=0;j<=25;j++)//内循环找出读入字母的位置 
		{
			if(charu[j]==chari[i])
			{
				a[j+1]++;//字母出现的个数 
			}
		}
	}
	for(i=1;i<=26;i++)
	{
		if(a[i]>max) a[i]=max;
		if(a[i]<min) a[i]=min;
	} 
	cha=max-min;
	for(i=2;i<cha;i++)
	{
		if(cha%i!=0) tmp++;
	}
	if(tmp==cha-2)
	{
		cout<<"Lucky Word"<<endl<<cha<<endl;
	}
	else
	{
		cout<<"No Answer"<<endl<<x<<endl;
	}	
	return 0;
}