#include <iostream>

using namespace std;
//https://mindcoding.ro/pb/ggx
void xorin() {
    int n = 0;
    int m = 0;
    int x = 0;
    int pivot = 0;
    cin >> n >> m >> x;
    int len = n * m;
    n = n * x;
    int lines = n;
    m = m * x;
    int cols = m;
    //the list of read elements
    int *v = new int[len];
    //the output matrix
    int **a = new int *[n];
    for (int i = 0; i < n; i++)
        a[i] = new int[m];
    //read
    for (int i = 0; i < len; i++)
        cin >> v[i];

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            a[i][j] = v[pivot];
            if (((j + 1) % x == 0) && (j + 1) != m)
                pivot++;
        }
        if ((i + 1) % x == 0)
            pivot++;
        else
            pivot=pivot-x+1;
    }

    //print the matrix
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++)
            cout << a[i][j] << " ";
        cout << endl;
    }
}

int main() {
//    givenBack();
    xorin();
    return 0;
}