a = []
r = []
f = ""
e = []

s = raw_input('Sentence: ')

ss = s.lower().split()

lss = len(ss)

c = 0
while c != lss:

    if ss[c] == 'chin' or ss[c] == 'chi':
        a.extend([1])
    else:
        a.extend([0])
    c += 1

r = a
c = 0
l = 0
while c != lss:

    if a[c] == 0:
        l += 1
        r[c] = l
        c += 1
    elif a[c] == 1:
        r[c] = l
        if c != 0:
            r[c - 1] = l
        if c != lss - 1:
            r[c + 1] = l
        c += 2

for l in range(1, 6):
    for c in range(0, lss):
        if r[c] == l:
            f += ss[c] + " "
    if f.strip() != "":
        e.extend([f.strip()])
    f = ""

print e