>>> from time_module import extract_time

>>> extract_time('Your class is 10:05:00')
(10, 5, 0)

>>> extract_time('my clock says now is 07:30:30')
(7, 30, 30)

>>> extract_time('Your class is 02:00:00')
(2, 0, 0)


>>> from time_module import time_left

>>> s = 'Your class is at 10:05:00 and it is now is 07:30:30.'
>>> time_left(s)
'The class starts in 2 hours, 34 minutes and 30 seconds.'

>>> s = 'Your class is at 10:05:00 and my watch says it is now 09:55:00.'
>>> time_left(s)
'The class starts in 0 hours, 10 minutes and 0 seconds.'

>>> s = 'Your class is at 10:05:00 and and according to my watch it is now 09:55:30.'
>>> time_left(s)
'Hurry up! The class starts in 9 minutes and 30 seconds.'

>>> s = 'Your class is at 10:05:00 and my watch says now is 10:00:00.'
>>> time_left(s)
'Hurry up! The class starts in 5 minutes and 0 seconds.'

>>> s = 'Your class is at 10:05:00 and according to my watch it is now 10:00:55.'
>>> time_left(s)
'Hurry up! The class starts in 4 minutes and 5 seconds.'



>>> from cons_module import cons_count

>>> sref = 'abcdefghijklmnopqrsPQRST'
>>> cons_count('The very txatxi_piruli.', sref)
6
>>> cons_count('The very txatxi.', sref)
3
>>> cons_count('The_txatxi.', sref)
2
>>> cons_count('Txatxi.', sref)
1



>>> from nums_module import nums_combine

nums_combine('21458', '51279')
'31368'
nums_combine('12345', '00000')
'01122
nums_combine('00000', '00000')
'00000'