import sys
input = lambda: sys.stdin.readline().strip()
import bisect

def Map():
  return list(map(int,input().split()))

S = 'NUPC'
T = []
for j in range(16):
  t = ''
  for i in range(4):
    t += S[i]
    if (j >> i) & 1:
      t += t
  T.append(t)
T.sort()
print(T[int(input())-1])