题解

#include<bits/stdc++.h>
using namespace std;

int main()
{
    int n,m,x,y;
    cin >> n >> m >> x >> y;
    if (y+1>m) cout << "NA\n";
    else cout << x << ' ' << y+1 << endl;
    if (x+1>n) cout << "NA\n";
    else cout << x+1 << ' ' << y << endl;
    if (y-1==0) cout << "NA\n";
    else cout << x << ' ' << y-1 << endl;
    if (x-1==0) cout << "NA\n";
    else cout << x-1 << ' ' << y << endl;
    return 0;
}