// editor4
#include<iostream>
#include<string>
using namespace std;
int main()
{
    strring u;
    int a;
    cin>>u;
    cin>>a;
    if(u.length()<3)
    {
        cout<<"Invalid input";
    }
    else if(a<18||a>100)
    {
        cout<<"Invalid input";
    }
    else
    {
        cout<<"Registration successful";
    }
    return 0;
    }