# your code goes here
import re
rx = re.compile(r'\b\d+\.\d+.+?(?=\d+\.\d+|$)')
string = "1.1 This is the 2,1 first 1.2 This is the 2,2 second 1.3 This is the 2,3 third "
matches = rx.findall(string)
print(matches)
IyB5b3VyIGNvZGUgZ29lcyBoZXJlCmltcG9ydCByZQpyeCA9IHJlLmNvbXBpbGUocidcYlxkK1wuXGQrLis/KD89XGQrXC5cZCt8JCknKQpzdHJpbmcgPSAiMS4xIFRoaXMgaXMgdGhlIDIsMSBmaXJzdCAxLjIgVGhpcyBpcyB0aGUgMiwyIHNlY29uZCAxLjMgVGhpcyBpcyB0aGUgMiwzIHRoaXJkICIKbWF0Y2hlcyA9IHJ4LmZpbmRhbGwoc3RyaW5nKQpwcmludChtYXRjaGVzKQ==