Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to copy a key [title] Hold the teeth on one side of the key over an open flame until they are charred. [step] Use a lighter or a lit candle. Move the teeth of the key back and forth over the flame.

Ending1: Hold them until there is no burning, then keep holding them. [title] You now have one duplicate key that is blue, white, or orange. Ending2: You want the teeth to smoke on the flame, never burn them. Do not allow the flame to touch a lighter. Ending3: It should take around 1 or 2 minutes to blacken one side of the key. Once the key is charred on one side, set it down until it is cool to the touch. Ending4: The material inside will help break down the wax in that area, which helps to reduce the likelihood of reconversion. [title] Turn off the flame, then perform the copying at the same time.

Answer format: ending1/ending2/ending3/ending4