#include <iostream>
#include <string>
using namespace std;

int main() {
  string username;
  int age;
  getline(cin, username);
  cin>>age;
  try{
      if(username.length()<3){
          throw "Invalid input";
      }
      if(age < 18 || age > 100){
          throw " Invalid input";
      }
      cout<< "Registration successful";
  }
  catch(char ch * a){
      cout<<a;
  }
  return 0;
}