#include <bits/stdc++.h>
#include <random>

using namespace std;

typedef unsigned long long ull;
typedef long long ll;
typedef double ld;
//#define ll __int128
//#define int ll
//#define int ll
//#define char ll
#define double ld
typedef vector<char> vc;
typedef vector<vc> vvc;
typedef vector<vvc> vvvc;
typedef pair<int, int> pii;
typedef pair<pii, pii> piii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii> vpi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef vector<short> vs;
typedef vector<vs> vvs;
typedef vector<vvs> vvvs;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<vvl> vvvl;
typedef vector<ld> vld;
typedef vector<vld> vvld;
typedef vector<vvld> vvvld;
typedef vector<string> vst;
typedef vector<vst> vvst;
typedef pair<ld, ld> pld;

#define inmin(a, b) a = min(a, (b))
#define inmax(a, b) a = max(a, (b))
#define ALL(a) a.begin(),a.end()
#define RALL(a) a.rbegin(),a.rend()
#define sqr(x) ((x) * (x))
#define fori(i, n) for(int i = 0; i < int(n); ++i)
#define SZ(a) ((int)((a).size()))
#define triple(T) tuple<T, T, T>
#define quad(T) tuple<T, T, T, T>
#define watch(x) cerr << (#x) << " = " << (x) << endl;

#ifdef MAX_HOME
#define cerr cout
#else
#define cerr if (false) cerr
#endif

const double PI = 2 * acos(0.0);
#define rand shittttty_shit
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng_64(chrono::steady_clock::now().time_since_epoch().count());

const string DIGITS = "0123456789";
const string ALPH = "abcdefghijklmnopqrstuvwxyz";


template<class T0, class T1>
inline ostream &operator<<(ostream &out, pair<T0, T1> &a) {
    return out << "{" << a.first << ", " << a.second << "}";
}

template<class T0, class T1>
inline istream &operator>>(istream &in, pair<T0, T1> &a) {
    return in >> a.first >> a.second;
}

template<class T0, class T1, class T2>
inline ostream &operator<<(ostream &out, tuple<T0, T1, T2> &a) {
    return out << "{" << get<0>(a) << ", " << get<1>(a) << ", " << get<2>(a) << "}";
}

template<class T0, class T1, class T2, class T3>
inline ostream &operator<<(ostream &out, tuple<T0, T1, T2, T3> &a) {
    return out << "{" << get<0>(a) << ", " << get<1>(a) << ", " << get<2>(a) << ", " << get<3>(a) << "}";
}

template<class T>
inline ostream &operator<<(ostream &out, vector<T> &a) {
    out << "[";
    fori (i, a.size())out << a[i] << vector<string>{", ", "]  "}[i + 1 == a.size()];
    return out;
}


void smain();


signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
#ifdef MAX_HOME
    freopen("input.txt", "r", stdin);
    clock_t start = clock();
#endif
    cout << setprecision(12) << fixed;
    smain();
#ifdef MAX_HOME
    cout << "\n\n\n\nTOTAL EXECUTION TIME: " << float(clock() - start) / CLOCKS_PER_SEC << endl;
#endif
    return 0;
}

map<int, vector<string>> ans;

void out(vector<string> kek) {
    for (auto x : kek) {
        cout << x << '\n';
    }
    exit(0);
}

void smain() {
    ans[3] = {"aaz",
              "b.z",
              "bff"};

    ans[4] = {"aabz", // 3
              "ddbz",
              "fxjj",
              "fxtt"};
    ans[5] = {"aabbc", // 3
              "txx.c",
              "t..lm",
              "u..lm",
              "uiirr"};
    ans[6] = {"aa.aaf", // 3
              "..cd.f",
              "..cdcc",
              "aafaa.",
              "d.f..c",
              "dcc..c"};
    ans[7] = {"aa.aa.f", // 3
              "..c..cf",
              "..c..ct",
              "aa.aa.t",
              "..c..cl",
              "..c..cl",
              "uuvvtt."};
    int n;
    cin >> n;
    int oldn = n;
    if (n == 2) {
        cout << "-1";
        return;
    }
    if (ans.count(n)) {
        out(ans[n]);
    }
    vi a;
    if (n % 5 == 1) {
        a.push_back(6);
        n -= 6;
    } else if (n % 5 == 2) {
        a.push_back(7);
        n -= 7;
    } else if (n % 5 == 3) {
        a.push_back(4);
        a.push_back(4);
        n -= 8;
    } else if (n % 5 == 4) {
        a.push_back(4);
        n -= 4;
    }

    while (n) {
        a.push_back(5);
        n -= 5;
    }

    n = oldn;
    vector<string> res(n, string(n, '.'));
    int st = 0;
    for (auto d : a) {
        fori (i, d) {
            fori (j, d) {
                res[i + st][j + st] = ans[d][i][j];
            }
        }
        st += d;
    }
    for (auto x : res) {
        cout << x << '\n';
    }
}


Measured memory_bytes: 2304