一五一十

lit. count by fives and tens (idiom); to narrate systematically and in full detail

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

five / 5

5-1 (May 1st)

ten / 10