n=int(input())
i=0
while i < n:
    sentence = i
    ch = sentence.count("h")
    ca = sentence.count("a")
    cc = sentence.count("c")
    ck = sentence.count("k")
    ce = sentence.count("e")
    cr = sentence.count("r")
    cn = sentence.count("n")
    if (ch>=1 and ca>=2 and cc>=1 and ck>=2 and ce>=1 and cr>=2 and cn>=1):
        print("YES")
    else:
        print("NO")
    i+=1