# Online Python compiler (interpreter) to run Python online.
# Write Python 3 code in this online editor and run it.
class NumberTools:
def __init__(self):
pass
def counter(rbegin: int, rend: int, **options):
try: flat = bool(options['flat'])
except KeyError: flat = False
rbegin = int(rbegin)
rend = int(rend)
orange = list(range(rbegin, rend+1))