#include<iostream>
using namespace std;
class book
{
    public:
    book()
    {
        string title,author;
        cin>>title;
        cin>>author;
        if(title.length()==0 || title.length()>100 || autor.length()==0 || author.length()>100)
        {
            cout<<"Invalid input";
            return;
        }
        cout<<"Title: "<<title<<endl;
        cout<<"Author: "<<author<<endl;
    }
};
int main()
{
    book obj;
    return 0;
}