#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    int n, k;
    cin >> n >> k;
    int sr, sc;
    int tr, tc;
    cin >> sr;
    sr--;
    cin >> sc;
    sc--;
    cin >> tr;
    tr--;
    cin >> tc;
    tc--;
    int d = abs(sr - tr) + abs(sc - tc);
    if (d % 2 != k % 2 || k < d || 2 * d < k) {
        cout << -1 << endl;
        return 0;
    }
    rep(i, n) {
        rep(j, n) {
            int dist = abs(i - sr) + abs(j - sc);
            if (dist % 2 && dist / 2 < (k - d) / 2) {
                cout << '#';
            } else {
                cout << '.';
            }
        }
        cout << endl;
    }
    return 0;
}