import sys

# import bisect #二分探索
# import math

from collections import deque
from collections import defaultdict


def I():
    return int(sys.stdin.readline().rstrip())


def MI():
    return map(int, sys.stdin.readline().rstrip().split())


def LI():
    return list(map(int, sys.stdin.readline().rstrip().split()))


def LI2():
    return list(map(int, sys.stdin.readline().rstrip()))


def S():
    return sys.stdin.readline().rstrip()


def LS():
    return list(sys.stdin.readline().rstrip().split())


def LS2():
    return list(sys.stdin.readline().rstrip())

# 1次元の配列
# list(map(int, input().split()))
# 2次元の配列
# [list(map(int, input().split())) for i in range()]
# wsl pypy3 ファイル名

input = sys.stdin.readline

K = I()
s_list = []
for i in range(1, 3):
    for j in range(1, 3):
        for k in range(1, 3):
            for l in range(1, 3):
                comp = "N"+f'{i}' + "U"+f'{j}' + "P"+f'{k}' + "C"+f'{l}'
                s = ""
                for m in range(8):
                    if m % 2 == 0:
                        s += comp[m]
                    else:
                        if comp[m] == "2":
                            s += s
                s_list.append(s)

s_list.sort()
print(s_list[K-1])