def _get_suitable_palettes(self, tile_pal: OrderedSet) -> List[int]:
"""
Check which palettes contain all colors of tile_pal.
If tile_pal is instead a superset of any of the palettes, those palettes are updated with the colors
from tile_pal.
"""
possible = []
for p_idx, p in enumerate(self.palettes):
if tile_pal.issubset(p):
possible.append(p_idx)
elif tile_pal.issuperset(p):
self.palettes[p_idx] = p.union(tile_pal)
possible.append(p_idx)
return possible
