def resolve():
    import sys

    input = sys.stdin.readline
    MOD = 998244353
    INF = float("inf")
    m = int(input())
    if m == 0:
        print("a")
        return
    print("co", end="")
    x = m
    dp = [1, 1, 0]
    y = 1
    while x:
        a = y
        b = a >> 1
        s = "c" * (b - dp[0])
        if s:
            print(s, end="")
            dp[0] = b
        while dp[1] < a:
            print("o", end="")
            dp[1] += dp[0]
        if x & 1:
            print("n", end="")
            dp[2] += dp[1]
        x >>= 1
        y <<= 1


if __name__ == "__main__":
    resolve()