s = input()

rDic = {}
for i in list("abcdefghijklmnopqrstuvwxyz1234567890"):
    rDic[i] = 0

for i in list("kyoprotenkei90"):
    rDic[i] = rDic[i] + 1

sDic = {}
for i in list("abcdefghijklmnopqrstuvwxyz1234567890"):
    sDic[i] = 0

for i in list(s):
    sDic[i] = sDic[i] + 1

r = "Yes"
for i in list("abcdefghijklmnopqrstuvwxyz1234567890"):
    if rDic[i] != sDic[i]:
        r = "No"
        break

print(r)