#include <iostream>
using namespace std;

int main() {
    cout << "Enter Row Input : " ;
    int n;
    cin >> n;
    cout << endl;
    
    int row = 1;
    
    while(row <= n){
        int col = 1;
        char ch = 'A' + row - 1;
        while(col <= n){
            cout << ch << " ";
            ch += 1;
            col += 1;
        }
        cout << endl;
        row += 1;
    }

    /*
    while(row <= n){
        int col = 1;
        while(col <= n){
            char ch = 'A' + row + col - 2;
            cout << ch << " ";
            col += 1;
        }
        cout << endl;
        row += 1;
    }
    */
}