s = input()
if len(s.split(',')) < 2:
	cor =  s.count(' or ')
	cand = s.count(' and ')
	cnor = s.count(' nor ')
	if cor + cand + cnor > 1:
		ind = -min(min(-s.find(' or '), -s.find(' and ')), -s.find(' nor '))
		tmp = s[ind+1:]
		tmp = tmp.replace(' or ', ', or ')
		tmp = tmp.replace(' nor ', ', nor ')
		tmp = tmp.replace(' and ', ', and ')
		s = s[:ind+1] + tmp
	print(s)
else:
	c = 0
	p = 0
	for i in range(len(s)-5):
		if s[i] == ',':
			c += 1
			p = 0
			continue
		elif (s[i-1] != ',') and ((s[i:i+4] == ' or ') or (s[i:i+5] == ' nor ') or (s[i:i+5] == ' and ')):
			if c > 0 and p == 1:
				s = s[:i] + ',' + s[i:]
				i += 4*(s[i:i+4] == ' or ') + 5*(s[i:i+5] == ' nor ') + 5*(s[i:i+5] == ' and ')
				c = 0
				p = 0
		elif s[i] == ' ':
			p += 1
	print(s)
 
a = 'abcdfsfsadsd'
a = a.replace('d', '7')	
print(a, a.find('6'))

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

QW5uIHBsYXllZCBmb290YmFsbCwgdGVubmlzIGFuZCBjaGVlcywgd2VudCBob21lLCBmb3Jnb3Qga2V5cyBhbmQgaGVyIHNuYWNrLg==

Ann played football, tennis and chees, went home, forgot keys and her snack.