D

#include <bits/stdc++.h>
using namespace std;

char grid[5][5];
int pos[3][5];

string r, c;
int n;

bool check() {

    for (int i = 0; i < n; i++) {
        int tmp = 0;
        while (grid[i][tmp] == '.') tmp++;
        if (grid[i][tmp] != r[i]) return 0;
    }
    for (int i = 0; i < n; i++) {
        int tmp = 0;
        while (grid[tmp][i] == '.') tmp++;
        if (grid[tmp][i] != c[i]) return 0;
    }
    return 1;
}

bool func(int lv, int now) {
    if (now == 3) {
        if (check()) return 1;
        return 0;
    }
    if (lv == n) {
        return func(0, now + 1);
    }
    for (int i = 0; i < n; i++) {
        if (grid[lv][i] != '.' || pos[now][i]) continue;
        grid[lv][i] = 'A' + now;
        pos[now][i] = 1;
        if (func(lv + 1, now)) return 1;
        grid[lv][i] = '.';
        pos[now][i] = 0;
    }
    return 0;
}

int main() {
    cin >> n >> r >> c;

    for (int i = 0; i < n; i++)
        for (int j = 0; j < n; j++)
            grid[i][j] = '.';

    if (func(0, 0)) {
        cout << "Yes\n";
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                cout << grid[i][j];
            }
            cout << '\n';
        }
    }
    else cout << "No\n";
}