A.cpp

/**************************************
 *
 * Author: Hadiur Rahman Nabil        *
 *
 **************************************/
#include <bits/stdc++.h>
using namespace std;

typedef long int li;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int, int> pi;
typedef pair<ll, ll> pll;

#define FAST                        \
  ios_base::sync_with_stdio(false); \
  cin.tie(NULL);                    \
  cout.tie(NULL);
#define pb push_back
#define mp make_pair
#define gcd(a, b) __gcd(a, b)
#define FOR(i, n) for (int i = 0; i < n; i++)
#define rep(i, k, n) for (int i = k; i < n; i++)
#define repp(i, k, n) for (int i = k; i <= n; i++)
#define endl "\n"

const int mod = 1e5 + 10;
const double PI = 3.1415926535897932384626;
const int mod_2 = 998244353;
const int MAX = 100005;
const double PII = 2.0 * acos(0.0);
/************************************************************************************************************************************************/

int main()
{
  FAST;
#ifndef ONLINE_JUDGE
// freopen("input.txt", "r", stdin);
// freopen("output.txt", "w", stdout);
#endif
  string s = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  ll k;
  cin >> k;
  for (int i = 0; i < k; i++)
  {
    cout << s[i];
  }
}