5-day work patterns:
(5,5,5,5,8), (5,5,5,6,7), (5,5,5,7,6), (5,5,5,8,5), (5,5,6,5,7), (5,5,6,6,6), (5,5,6,7,5), (5,5,7,5,6),
(5,5,7,6,5), (5,5,8,5,5), (5,6,5,5,7), (5,6,5,6,6), (5,6,5,7,5), (5,6,6,5,6), (5,6,6,6,5), (5,7,5,5,6),
(5,7,5,6,5), (5,7,6,5,5), (5,8,5,5,5), (6,5,5,5,7), (6,5,5,6,6), (6,5,5,7,5), (6,5,6,5,6), (6,5,6,6,5),
(6,6,5,5,6), (6,6,5,6,5), (6,6,6,5,5), (6,7,5,5,5), (7,6,5,5,5), (7,5,5,5,6), (7,5,5,6,5), (7,5,6,5,5),
(7,6,5,5,5), (8,5,5,5,5).