dic0 = {'k': 2, 'y': 1, 'o': 2, 'p': 1, 'r': 1, 't': 1, 'e': 2, 'n': 1, 'i': 1, '9': 1, '0': 1}
S = input()
dic = {}
for i in range(len(S)):
    s = S[i] 
    if s in dic:
        dic[s] += 1
    else:
        dic[s] = 1
print(["No","Yes"][dic == dic0])