Please choose the correct ending to complete the given sentence: Work World: [header] How to change a typewriter ribbon [title] Find the ribbon spools. [step] First, carefully lift the top " bonnet " of the typewriter. Then, look for the typewriter ribbon wound around two metal or plastic spools: much like the sort that you'd use for sewing thread or rope.

Ending1: [title] Remove anything that might get caught in the typewriter spools. [step] Ribbon spools are extremely sticky, and it's important to remove all any objects, including newspaper or paper clips. Ending2: The spools should look like a series of cogs, or, at least, like diagonals. From the cogs, cut the ribbon into four pieces. Ending3: The spools are set up in an s-shaped configuration on two axles. The ribbon itself stretches between the spools and through an aligning scale. Ending4: [substeps] Ensure that the ribbon is long enough. 18 inches (45.7 cm) works for 8 pages, while 20 inches (40.

Answer format: ending1/ending2/ending3/ending4