#!/usr/bin/env python3.8
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import itertools

N = int(read())


def f(N, i):
    i %= 3
    a = str(i)
    if N == 1:
        return a
    if N == 2:
        return a + a
    if N & 1:
        return a + f(N - 1, i + 1) + a
    return a + a + f((N - 2) // 2, i + 1) + a + a

word = f(N, 0).replace('0', 'a').replace('1', 'b').replace('2', 'c')
print(word)