- import re 
- sz = ["first_name last_name","last_name, first_name"] 
- for s in sz: 
- 	m = re.search(r'(\w+),\s+(\w+)|(\w+)\s+(\w+)', s) 
- 	if m: 
- 		surname = "{}{}".format(m.group(1) or '', m.group(4) or '') 
- 		name = "{}{}".format(m.group(2) or '', m.group(3) or '')  
- 		print("{} {}".format(name, surname)) 
- 	else: 
- 		print("No match") 
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