K=int(input())
S=[]
from itertools import product
for s2,s4,s6,s8 in product(range(2),range(2),range(2),range(2)):
    s="N"
    if s2==1:s+=s
    s+="U"
    if s4==1:s+=s
    s+="P"
    if s6==1:s+=s
    s+="C"
    if s8==1:s+=s
    S.append(s)
S.sort()
print(S[K-1])