Woodland Mansion/Structure/2nd to 3rd Floor Staircase

2nd Floor to 3rd Floor Staircase
There is two variants of the staircase.

Stair with Side Entrance (1x2_c_stairs)
These stairs spawn with the entrance to the sides of the cobblestone stairs.

Stairs with Straight On Entrance (1x2_d_stairs)
There is no pillar of cobblestone supporting it and the entrance is straight on.