Please choose the correct ending to complete the given sentence: Health: [header] How to use a urine dipstick test [title] Wash your hands. [step] Wet your hands with warm water then rub antibacterial soap between them for at least 20 seconds. Rinse your hands with warm, running, water then dry them with a clean single-use paper towel.

Ending1: [substeps] Make sure to dry your hands before you use the self-test. [title] Draw a line straight down from the tip of your index finger up to your middle finger. Ending2: [title] Moisten your moistened cotton ball with urine; hold it between your thumb and index finger. [step] Aim the dampen cotton ball at the paper-coated portion of the skin. Ending3: If you are taking a urine sample, the most important thing is to get your hands clean. Always work from your waist upward, and at the top of your thigh, stopping when you reach your hip. Ending4: [title] Fill a sterile specimen container with urine. [step] Urinalysis tests should always be conducted using fresh urine.

Answer format: ending1/ending2/ending3/ending4