#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n == 1) {
    cout << "c" << endl;
  } else {
    if (n % 2 == 0) {
      for (int i = 0; i < (n + 2) / 2; i++) {
        if (i % 2 == 0) {
          cout << "a";
        } else {
          cout << "b";
        }
      }
      cout << endl;
    } else {
      n -= 1;
      for (int i = 0; i < (n + 2) / 2; i++) {
        if (i % 2 == 0) {
          cout << "a";
        } else {
          cout << "b";
        }
      }
      cout << "c" << endl;
    }
  }
  return 0;
}
