#include <iostream>

#include #include #include using namespace std; bool prime(int n){ if(n0||n1){ return false; } if(n2){ return true; } for(int i=3;i<sqrt(n);i++){ if(n%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; }