import sys, re
data = sys.stdin.read()
# sys.stderr.write("JMD "+data)
m = re.compile(r'^(.*)(.*?)(.*)$').match(data)
if not m:
print data
sys.exit(0)
pre = m.group(1)
cont = m.group(2)
post = m.group(3)
for pattern,replacement in [
(re.compile(r'^\S+:\s*'), ''),
(re.compile(r'(https?:\S+?)([-\'\"\.\;\:\,]*)(?:\s|$)'), r'\1\2 '),
(re.compile(r'\@(\S+?)([-\'\"\.\;\:\,]*)(?:\s|$)'), r'@\1\2 ')
]:
cont=pattern.sub(replacement,cont)
print pre, cont, post