#include <iostream>
using namespace std;
 
class A
{
    int a, b, c, d;
public:
 
    friend istream& operator>>(istream&, A&);
    friend ostream& operator<<(ostream&, const A&);
 
};
 
istream& operator>>(istream& i, A& a)
{
    return i >> a.a >> a.b >> a.c >> a.d;
}
 
ostream& operator<<(ostream& o, const A& a)
{
    return o << a.a << endl << a.b << endl << a.c << endl << a.d << endl;
}
 
int main()
{
    A a;
    cin >> a;
    cout << a;
    return 0;
}

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