S = input
R = range
P = print
def I(): return int(S())
def M(): return map(int, S().split())
def L(): return list(M())
def O(): return list(map(int, open(0).read().split()))
def yn(b): print("Yes" if b else "No")
biga = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
smaa = "abcdefghijklmnopqrstuvwxyz"

def z(s):
	ans = ""
	for i in s:
		if i == '2':
			ans += ans
		elif i != '1':
			ans += i
	return ans

K = int(input())
a = []
for i in range(16):
	x = ""
	for j in range(8):
		if j % 2 == 0:
			x += "NUPC"[j // 2]
		else:
			x += "12"[(i >> (j // 2)) & 1]
	a.append(z(x))
a.sort()
print(a[K - 1])