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

int main() {
    int n, k, sr, sc, tr, tc; cin >> n >> k >> sr >> sc >> tr >> tc;
    --sr; --sc; --tr; --tc;
    int dist = abs(sr - tr) + abs(sc - tc);
    if (k < dist || k > dist * 2) {
        cout << -1 << endl; return 0;
    }
    int plus = k - dist;
    if (plus % 2 == 1) {
        cout << -1 << endl; return 0;
    }
    vector<string> s(n);
    rep(i, n) rep(j, n) {
        int d = abs(sr - i) + abs(sc - j);
        if (d % 2 == 1 && d <= plus) s[i] += '#';
        else s[i] += '.';
    }

    rep(i, n) cout << s[i] << endl;
}