#include<iostream>
#include<cstdio>
#include<string>
#include<math.h>
#include<cstring>
using namespace std;
char num[100];
int a[300];
int prime(int a)
{
int i,manx=0,minn=100;
if(a==0)
return 0;
if(a==1)
return 0;
for(i=2;i<=sqrt(a);i++)
if(a%i==0)
return 0;
return 1;
}
int main()
{
int i,len,maxn=0,minn=100;
gets(num);
len=strlen(num);
for(i=0;i<len;i++)
a[num[i]]++;
for(i=97;i<=122;i++)
{
if(a[i]!=0)
{
if(maxn<a[i])
maxn=a[i];
if(minn>a[i])
minn=a[i];
}
}
if(prime(maxn-minn)==1)
{
cout<<"Lucky Word"<<endl;
cout<<maxn-minn;
}
else
{
cout<<"No Answer"<<endl;
cout<<0;
}
return 0;
}100'
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