import sys
input = lambda : sys.stdin.readline().rstrip()

sys.setrecursionlimit(2*10**5+10)
write = lambda x: sys.stdout.write(x+"\n")
debug = lambda x: sys.stderr.write(x+"\n")
writef = lambda x: print("{:.12f}".format(x))

s = "kyoprotenkei90"
v = input()
from collections import Counter
c1 = Counter(s)
c2 = Counter(v)
if c1==c2:
    print("Yes")
else:
    print("No")