== 1. entering and leaving ==
   board: {SMALL=1, MEDIUM=2, LARGE=1}
   board: {SMALL=1, MEDIUM=1, LARGE=1}
   board: {SMALL=1, MEDIUM=1, LARGE=0}
bike  -> F0-1, car -> F0-2, truck -> F0-3
   board: {SMALL=1, MEDIUM=2, LARGE=0}
car stayed 130 min, fee = 60

== 2. failures ==
second MH03-TRK : MH03-TRK is already inside the lot
another truck  : no free spot for TRUCK MH04-TRK
reused ticket  : unknown or already used ticket T-2

== 3. the strategy decides where the motorcycle goes ==
NearestFirstStrategy puts a motorcycle in F0-1
BestFitStrategy puts a motorcycle in F1-1