stair is part of:

stair contains:
    50%  staircase
    50%  staired

Full expansion for stair:
    50%  Belville 5-Step Straight Staircase
    50%  12x12x12 Quarter-Spiral Staircase
    50%  1x12x3 Staired Full-Arch Brick
    50%  4x7x6 Open-Riser Staircase
    50%  6x6x9 Quarter-Spiral Staircase
    45%  6x4x6 Staired Sloped Wall, Jackal Decor
    45%  6x4x6 Staired Sloped Wall, Owl Decor
    45%  6x4x6 Staired Sloped Wall