▁consist ▁of ▁at ▁least ▁two ▁natural ▁cards , ▁and ▁can ▁never ▁have ▁more ▁than ▁three ▁wild ▁cards . ▁Ex amples : ▁ 5 - 5 - 2 ▁and ▁ 9 - 9 - 2 - 2 - J oker ▁are ▁legal ▁m eld s . ▁ 5 - 2 - 2 ▁is ▁not ▁a ▁legal ▁m eld ▁as ▁it ▁contains ▁only ▁one ▁natural ▁card . ▁ 9 - 9 - 9 - 2 - 2 - 2 - J oker ▁is ▁not ▁legal ▁as ▁it ▁contains ▁more ▁than ▁three ▁wild ▁cards . ▁ ▁A ▁can asta ▁is ▁a ▁m eld ▁of ▁at ▁least ▁seven ▁cards , ▁whether ▁natural ▁or ▁mixed . ▁A ▁natural ▁can asta ▁is ▁one ▁that ▁compr ises ▁only ▁cards ▁of ▁the ▁same ▁rank . ▁A ▁mixed ▁can asta ▁( or ▁dirty ▁can asta ) ▁is ▁one ▁that ▁compr ises ▁both ▁natural ▁and ▁wild ▁cards . ▁ ▁A ▁" con ce aled " ▁can asta ▁is ▁a ▁can asta ▁assemble d ▁in ▁the ▁player ' s ▁hand ▁and ▁is ▁played ▁to ▁the ▁table ▁complete , ▁or ▁requiring ▁only ▁the ▁top ▁card ▁from ▁the ▁disc ard ▁p ile ▁( the ▁disc ard ▁p ile ▁being ▁picked ▁up ▁in ▁the ▁usual ▁way ). ▁A ▁conce aled ▁can asta ▁may ▁be ▁natural ▁or ▁mixed ▁and ▁car ries ▁a ▁bonus ▁score ▁of ▁ 1 0 0 ▁points ▁( so ▁ 4 0 0 ▁for ▁a ▁conce aled ▁mixed ▁can asta ▁and ▁ 6 0 0 ▁for ▁a ▁conce aled ▁natural ▁can asta ). ▁ ▁Initial