import re
s = input()
k1 = 'keyence'
k2 = 'keyofscience'
ans = 'NO'
if s in 'keyence' or s in 'keyofscience':
    ans = 'YES'
else:
    for i in range(len(k1)):
        a = '^'+k1[:i]+'.*?'+k1[i+1:]+'$'
        if re.match(a,s):
            ans = 'YES'
    for i in range(len(k2)):
        a = '^'+k2[:i]+'.*?'+k2[i+1:]+'$'
        if re.match(a,s):
            ans = 'YES'
print(ans)
