Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to replace the line on a black and decker trimmer [title] Turn off all power to your trimmer. [step] To safely replace the line on your power trimmer, it's important that it doesn't turn on while you work on it. Unplug the trimmer or remove the ion battery that came with it.

Ending1: [title] Blow out the batteries and ignite the black and decker trimmer with a u-joint or drag the battery forward. [step] Hold the gears tight and spin the belt up and down quickly until the battery is fully charged. Ending2: This will ensure that you won't accidentally turn on the trimmer and injure yourself. [title] Sit the trimmer on a table or chair. Ending3: [title] Wrap masking tape around the top of the trimmer in circular motions. [step] In order to keep the line from turning on while you unplug the trimmer from it's power outlet, wrap several masking tape around the top of the trimmer's base. Ending4: [title] Remove the screw holding the line together. [step] The bit holding the line together should be located at the bottom of the printer stand.

Answer format: ending1/ending2/ending3/ending4