Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to run up stirrups [title] Arrange the stirrup leathers so they hang straight down. [step] Allow the leather to lie flat against the saddle without twisting in either direction. The two sides of the leather should be on top of one another.

Ending1: [substeps] Feed your short rein between each stirrup. Remove any loose string from the reins while inserting each rein. Ending2: [title] Strap one rein into the stirrup. [step] Start by applying pressure to the rein across the bottom of the hoof, whilst turning the tip of the second rein on the opposite leg to adjust. Ending3: [title] Hold the saddle using your left hand and your right hand. [step] The saddle should be supported on the sole of the opposite foot. Ending4: Your stirrup leathers will hang straight down with the stirrups dangling at the ends. Make sure that there are no knots or messes and that the leather straps are smoothly hanging on the stirrup bars.

Answer format: ending1/ending2/ending3/ending4