#include <iostream> #include <cstdio> #include <cmath> #include <cstring> using namespace std; bool prime(int x){ if(x0||x1){ return false; } if(x2){ return true; } for(int i=3;i<sqrt(x);i++){ if(x%i0){ return false; } } return true; } int main(){ char s[1000]; cin>>s; int a[24]={0},maxn=-999,minn=999;

for(int i=0;i<strlen(s);i++){
	a[s[i]-'a']++;
}
for(int i=0;i<24;i++){
	if(a[i]>maxn){
		maxn=a[i];
	}
	if(a[i]<minn&&a[i]!=0){
		minn=a[i];
	}
}
int p=maxn-minn;
if(prime(p)){
	cout<<"Lucky Word"<<endl;
	cout<<p;
}else{
	cout<<"No Answer"<<endl;
	cout<<0; 
}
return 0;

}