add 12 buildings
add 32 buildings
add 40 buildings
add 100 buildings
add 54 buildings
add 30 buildings
add 20 buildings
add 21 buildings
add 42 buildings
add 50 buildings
add 43 buildings
add 90 buildings
add 18 buildings
add 100 new buildings
add new 16 buildings
add 60 buildings
add 61 buildings