Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to grow hydroponic mushrooms [title] Purchase a mushroom growing kit from your local gardening supply store. [step] Kits are blocks of compressed sawdust that have been saturated with mushroom seeds. [title] Immerse the mushroom block in a container of cold water.

Ending1: [step] Let the mushroom build itself up into a gel-like cup. [title] Place a handful of the sawdust into the bottom of the container. Ending2: [step] Leave it submerged for 10 to 30 minutes, or more if water is less readily available to strain the mushroom from the surrounding water. This will give your mushrooms a vigorous soaking to prevent oxidation. Ending3: [step] Make sure it is completely immersed; allow several inches of water to cover the top of the block. [title] Allow the block to soak for several hours. Ending4: [step] Add 2 5 gallon buckets of tap water. [title] Wash the mushroom block in room temperature water.

Answer format: ending1/ending2/ending3/ending4