17 # calling the matching function

    17 # calling the matching function

    18 s = ("a" * int(cn))

    18 s = ("a" * int(cn))

    19 m = re.match('(a*)*b' , s) 

    19 m = re.match('(a*)*b' , s) 

    20 

    20 

    21 print s

    21 print s