This version, requested by star73 on the forum ( http://lalescu.ro/liviu/fet/forum/index.php?topic=1807.0 ),
adds a new space constraint, teacher begins days in a certain building.

2014-11-15 (15 November 2014).

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For version 2, addition on 2014-11-20 (20 November 2014), if a teacher ends in string " AB", he can change buildings between
slots 3 and 4 from building ending in " A" to building ending in " B" without min gaps needed.