#include <stdio.h>
 
int min(int a, int b) {
	if (a>b) return a;
	return b;
}
 
int main() {
	int n;
	for (int i = 0; i<n*2+1; ++i) {
		for (int j = 0; j<n*2+1; ++j) {
			printf("%d ",n 
- min
(i
,j
) +1); 		}
	}
}
				I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWluKGludCBhLCBpbnQgYikgewoJaWYgKGE+YikgcmV0dXJuIGE7CglyZXR1cm4gYjsKfQoKaW50IG1haW4oKSB7CglpbnQgbjsKCXNjYW5mKCIlZCIsJm4pOwoJZm9yIChpbnQgaSA9IDA7IGk8bioyKzE7ICsraSkgewoJCWZvciAoaW50IGogPSAwOyBqPG4qMisxOyArK2opIHsKCQkJcHJpbnRmKCIlZCAiLG4gLSBtaW4oaSxqKSArMSk7CgkJfQoJCXByaW50ZigiXG4iKTsKCX0KfQ==