S = input()
s = 'kyoprotenkei90'
k = 2
y = 1
o = 2
p = 1
r = 1
t = 1
e = 2
n = 1
i = 1
nine = 1
zero = 1

for i in range(len(S)):
    if S[i] in s:
        if 'k' == S[i]:
            k -= 1
        if 'y' == S[i]:
            y -= 1
        if 'o' == S[i]:
            o -= 1
        if 'p' == S[i]:
            p -= 1
        if 'r' == S[i]:
            r -= 1
        if 't' == S[i]:
            t -= 1
        if 'e' == S[i]:
            e -= 1
        if 'n' == S[i]:
            n -= 1
        if 'i' == S[i]:
            i -= 1
        if '9' == S[i]:
            nine -= 1
        if '0' == S[i]:
            zero -= 1

if (k+y+o+p+r+t+e+n+i+nine+zero) == 0:
    print('Yes')
else:
    print('No')