Case 1 can have 4 towers fall.
Case 2 can have 1 towers fall.
Case 3 can have 100 towers fall.
Case 4 can have 1 towers fall.
Case 5 can have 100 towers fall.
Case 6 can have 69 towers fall.
Case 7 can have 20 towers fall.
Case 8 can have 18 towers fall.