#include <iostream>
#include <conio.h>
//#include <math.h>

using std::cout;
using std::cin;

int main()
{
    int k,l,m,n,x,y,x1,y1;
    cout<<"Vvedite (k,l) (m,n)\n";
    cin>>k>>l>>m>>n;
    x=1;
    y=1;
    if (((k+l)&1&&(m+n)&1)||((k+l)%2==0&&(m+n)%2==0)) {
        if(abs(m-k)==abs(n-l))
            cout<<"S polya (k,l) za odin hod vozmozhno popast na pole (m,n)";
        else {
            x1=1;
            y1=1;
        }

       for (int i=x1; i<=8; i++)
            if(abs(k-i)==abs(l-n)) {
                x=i;
                y=n;
            }
            else
                cout<<1<<" "<<1;


        for (int i=y1; i<=8; i++)
            if(abs(k-m)==abs(l-i)) {
                x=m;
                y=i;
            }
            else
                cout<<1<<" "<<1;

       cout<<x<<" "<<y;

    }
    else
        cout<<"Nevozmozhno s polya (k,l) popast na pole (m,n)";
    _getch();
}