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

using namespace std;

int main() {
    int n, k;
    cin >> n >> k;
    
    int sr, sc, tr, tc;
    cin >> sr >> sc >> tr >> tc;
    
    int d = abs(sr-tr) + abs(sc-tc);
    
    if (k < d or k > 2*d or (k-d)%2) {
        puts("-1");
        return 0;
    } 
    
    int diff = k-d;
    
    for (int r = 1; r <= n; ++r) {
        string s;
        for (int c = 1; c <= n; ++c) {
            int nd = abs(r-sr) + abs(c-sc);
            if (nd <= diff-1 and nd%2) s += '#';
            else s += '.';
        }
        cout << s << '\n';
    }
    
    return 0;
}