#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using vll = vector<ll>;
const ll INF = LLONG_MAX / 4;
bool chmin(auto& a, const auto& b) { return a > b ? a = b, 1 : 0; }
bool chmax(auto& a, const auto& b) { return a < b ? a = b, 1 : 0; }
auto sz(const auto& a) { return ssize(a); }
#define OVERLOAD_REP(a, b, c, d, name, ...) name
#define rep(...) OVERLOAD_REP(__VA_ARGS__, REP3, REP2, REP1, REP0)(__VA_ARGS__)
#define REP0(x) for (ll _rep_counter = 0; _rep_counter < (x); ++_rep_counter)
#define REP1(i, x) for (ll i = 0; (i) < (x); ++(i))
#define REP2(i, l, r) for (ll i = (l); (i) < (r); ++(i))
#define REP3(i, l, r, c) for (ll i = (l); ((c) > 0 ? (i) < (r) : (i) > (r)); i += (c))
#define each(x,a) for (auto&& x : a)
#define MOD 998244353
#define ll0 ((ll)0)

void solve() {
    ll n; cin >> n;
    vector v(n, vll(n, 0));
    rep(i, n) {
        v[i][n-1-i] = 1;
        if(i > 0) v[i][n-1-i+1] = 1;
        if(i < n-1) v[i][n-1-i-1] = 1;
    }
    rep(i, n) {
        string s = "";
        rep(j, n) {
            s += ".#"[v[i][j]];
        }
        cout << s << endl;
    }
}
int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    solve();
}