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

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int N, K;
    int sr, sc, tr, tc;
    cin >> N >> K >> sr >> sc >> tr >> tc;
    sr--; sc--; tr--; tc--;

    int dist = abs(sr - tr) + abs(sc - tc);

    if(dist % 2 != K % 2) {
        cout << "-1\n";
        return 0;
    }

    if(K % 2 == 0) {
        if(K < dist || 2 * dist < K) {
            cout << "-1\n";
            return 0;
        }
    }

    if(K % 2 == 1) {
        if(K < dist || 2 * dist - 1 < K) {
            cout << "-1\n";
            return 0;
        }
    }

    if(sc > tc) {
        swap(sc, tc);
        swap(sr, tr);
    }

    int tgt = 2 * dist - K;

    for(int i = 0; i < N; i++) {
        for(int j = 0; j < N; j++) {
            if((i + j) % 2 == (sr + sc) % 2) {
                cout << ".";
            }
            else if(i == tr && j == tc) {
                cout << ".";
            }
            else if(abs(i - sr) + abs(j - sc) < tgt) {
                cout << ".";
            }
            else {
                cout << "#";
            }
        }

        cout << "\n";
    }

    return 0;
}