// >>> TEMPLATES
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define int ll
#define double ld
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define rep1(i,n) for (int i = 1; i <= (int)(n); i++)
#define repR(i,n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep1R(i,n) for (int i = (int)(n); i >= 1; i--)
#define loop(i,a,B) for (int i = a; i B; i++)
#define loopR(i,a,B) for (int i = a; i B; i--)
#define all(x) (x).begin(), (x).end()
#define allR(x) (x).rbegin(), (x).rend()
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fst first
#define snd second
#define INF (numeric_limits<int>::max()/2-1)
#ifdef LOCAL
#define dump(...) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] ", dump_impl(#__VA_ARGS__, __VA_ARGS__)
#define say(x) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] " << x << endl;
#define debug if (1)
void dump_impl(const char*) { cerr << endl; }
template <class T, class... U> void dump_impl(const char *s, T const& x, U const& ...y) { const char *o = "({[", *e = "]})"; for (int i = 0; *s != '\0'; cerr << *s++) { if (count(o,o+3,*s)) i++; if (count(e,e+3,*s)) i--; if (!i && *s == ',') break; } cerr << " = " << x; if (*s == ',') cerr << ", ", s++; dump_impl(s, y...); }
#else
#define dump(...)
#define say(x)
#define debug if (0)
#endif
template <class T> using pque_max = priority_queue<T>;
template <class T> using pque_min = priority_queue<T, vector<T>, greater<T> >;
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
ostream& operator<<(ostream& os, T const& v) { os << "{"; for (auto const& x : v) os << " " << x; return os << " }"; }
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
template <class T, class S> ostream& operator<<(ostream& os, pair<T,S> const& p) { return os << "(" << p.first << ", " << p.second << ")"; }
template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
template <size_t i, class T> typename enable_if<i >= tuple_size<T>::value>::type output_tuple(ostream&, T const&) { }
template <size_t i = 0, class T> typename enable_if<i < tuple_size<T>::value>::type
output_tuple(ostream& os, T const& t) { os << (i ? " " : "") << get<i>(t); output_tuple<i+1,T>(os,t); }
template <class... T> ostream& operator<<(ostream& os, tuple<T...> const& t) { return output_tuple(os,t), os; }
struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
template <class F> struct FixPoint : private F {
    constexpr FixPoint(F&& f) : F(forward<F>(f)) {}
    template <class... T> constexpr auto operator()(T&&... x) const { return F::operator()(*this, forward<T>(x)...); }
};
struct MakeFixPoint {
    template <class F> constexpr auto operator|(F&& f) const { return FixPoint<F>(forward<F>(f)); }
};
#define MFP MakeFixPoint()|
#define def(name, ...) auto name = MFP [&](auto &&name, __VA_ARGS__)
template <class T, size_t d> struct vec_impl {
    using type = vector<typename vec_impl<T,d-1>::type>;
    template <class... U> static type make_v(size_t n, U&&... x) { return type(n, vec_impl<T,d-1>::make_v(forward<U>(x)...)); }
};
template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
template <class T, size_t d = 1> using vec = typename vec_impl<T,d>::type;
template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
template <class T> constexpr bool chmin(T& x, T const& y) { if (x > y) { x = y; return true; } return false; }
template <class T> constexpr bool chmax(T& x, T const& y) { if (x < y) { x = y; return true; } return false; }
template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
template <class T> int sz(T const& x) { return x.size(); }
// <<<

int32_t main() {
    int n; cin >> n;
    if (n == 2) quit(-1);
    if (n == 7) {
        cout << "....abc" << endl;
        cout << "....abc" << endl;
        cout << "....bca" << endl;
        cout << "....bca" << endl;
        cout << "aabbaa." << endl;
        cout << "bbcc..b" << endl;
        cout << "ccaa..b" << endl;
        return 0;
    }
    if (n == 3) {
        cout << "aad" << endl;
        cout << "b.d" << endl;
        cout << "bcc" << endl;
        return 0;
    }
    int x = 0, y = 0, z = 0;
    if (n % 4 == 0) {
        x = n/4, y = 0, z = 0;
    } else if (n % 4 == 1) {
        x = (n-5)/4, y = 1, z = 0;
    } else if (n == 6) {
        x = 0, y = 0, z = 1;
    } else if (n % 4 == 2) {
        x = (n-10)/4, y = 2, z = 0;
    } else if (n == 11) {
        x = 0, y = 1, z = 1;
    } else if (n % 4 == 3) {
        x = (n-15)/4, y = 3, z = 0;
    } else {
        assert(0);
    }

    vector<string> A = {
        "abcc",
        "abdd",
        "ccab",
        "ddab",
    }, B = {
        "..abc",
        "..abc",
        "aaeef",
        "bbf.f",
        "ccfee",
    }, C = {
        "aabee.",
        "c.b..f",
        "cdd..f",
        "ee.aab",
        "..fc.b",
        "..fcdd"
    };

    auto ans = make_v<char,2>(n,n,'.');

    rep (k,x) {
        int kk = 4*k;
        rep (i,4) rep (j,4) ans[kk+i][kk+j] = A[i][j];
    }
    rep (k,y) {
        int kk = 4*x + 5*k;
        rep (i,5) rep (j,5) ans[kk+i][kk+j] = B[i][j];
    }
    rep (k,z) {
        int kk = 4*x + 5*y + 6*k;
        rep (i,6) rep (j,6) ans[kk+i][kk+j] = C[i][j];
    }

    rep (i,n) {
        rep (j,n) cout << ans[i][j];
        cout << "\n";
    }




}


Measured memory_bytes: 2304