Requested by ngoctp29121982 on the forum: https://lalescu.ro/liviu/fet/forum/index.php?topic=5480.0 We are teachers from Vietnam who want to create a custom version called FET_VN with the following constraints: 1. Constraint teacher max gaps per day x 2. Constraint teacher max days per week x (. Limit the maximum number of teacher days per week x) 3. Constraint Teacher Min Hours Daily x 4. Constraint Teacher Max Hours Daily x Request: -Add these constraints to the csv file so we can use FET faster. -Add 1 dialog box in the official version: sort the number of teachers' lectures in ascending order from 1 to the largest number, the purpose is to Constraint teacher max days per week x (Limit the maximum number of teachers' days per week) x)