Problem: You are given four integers: H, W, h and w (1 ≤ h ≤ H, 1 ≤ w ≤ W). Determine whether there exists a matrix such that all of the following conditions are held, and construct one such matrix if the answer is positive:

* The matrix has H rows and W columns.
* Each element of the matrix is an integer between -10^9 and 10^9 (inclusive).
* The sum of all the elements of the matrix is positive.
* The sum of all the elements within every subrectangle with h rows and w columns in the matrix is negative.

Constraints

* 1 ≤ h ≤ H ≤ 500
* 1 ≤ w ≤ W ≤ 500

Input

Input is given from Standard Input in the following format:


H W h w


Output

If there does not exist a matrix that satisfies all of the conditions, print `No`.

Otherwise, print `Yes` in the first line, and print a matrix in the subsequent lines in the following format:


a_{11} ... a_{1W}
:
a_{H1} ... a_{HW}


Here, a_{ij} represents the (i,\ j) element of the matrix.

Examples

Input

3 3 2 2


Output

Yes
1 1 1
1 -4 1
1 1 1


Input

2 4 1 2


Output

No


Input

3 4 2 3


Output

Yes
2 -5 8 7
3 -5 -4 -5
2 1 -1 7

Solution (in CPP):

Solution:
#include <iostream>
#include <cstdio>
#define N 505
using namespace std;

int H, W, h, w, a[N][N];
int main()
{
	int i, j;
	cin >> H >> W >> h >> w;
	if (H % h == 0 && W % w == 0) {cout << "No"; return 0;}
	cout << "Yes" << endl;
	if (H % h) {
		for (i = 0; i < H; i++) {
			for (j = 0; j < W; j++) a[i][j] = i % h ? -1000 : 1000 * h - 1001;
		}
	} else {
		for (i = 0; i < W; i++) {
			for (j = 0; j < H; j++) a[j][i] = i % w ? -1000 : 1000 * w - 1001;
		}
	}
	for (i = 0; i < H; i++, puts("")) for (j = 0; j < W; j++) printf("%d ", a[i][j]);
    return 0;
}