Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to reset a master lock [title] Open the lock using the old combination. [step] Once you open the lock, turn the shackle off to the side so that you can access the shackle hole. If you do not have the old combination to the lock, you will not be able to reset it.

Ending1: [title] Remove the shackle from the locking crack. [step] Use a pair of needle-nose pliers to quickly tug the shackle and shackle apart. Ending2: [title] Put your old master lock shackle back into the lock if it seems lame. [step] If you have the old combination to the lock, it will wiggle loose and leave the key in the lock with the shackle. Ending3: [substeps] If this is the first time you are using the lock, use the preset combination. This will be listed on the packaging material that came with the lock. Ending4: [title] Push the shackle out of the lock. [step] The shackle should snap out of the lock at the same time as you lift it out of the lock.

Answer format: ending1/ending2/ending3/ending4