Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to fix a running toilet [title] Turn off the water and drain the toilet. [step] Before you can check the flapper for problems, turn off the water to the toilet. Flush the toilet to drain excess water from the tank.

Ending1: [title] Flush the toilet for five to ten seconds. [step] Once the toilet is flushed, turn off the water to the water supply system. Ending2: [substeps] If your toilet is flushed and warm to the touch (which is normal), it's safe to assume your water is normal. [title] Check to see if the flapper is empty. Ending3: This will allow you to inspect the flapper without having the toilet running constantly. [substeps] The flapper is a round rubber seal that stops water from draining from the tank and into the toilet bowl. Ending4: Shut the water supply to the tank and unscrew the screw to detach the flapper if it's off. [title] Remove the toilet seat for the first time.

Answer format: ending1/ending2/ending3/ending4