numbers ∕ four-digit numbers 90xxtable of four-digit numbers (digits) ⫽ 9000 ― 909990x090x190x290x390x490x590x690x790x890x99000900190029003900490059006900790089009901090119012901390149015901690179018901990209021902290239024902590269027902890299030903190329033903490359036903790389039904090419042904390449045904690479048904990509051905290539054905590569057905890599060906190629063906490659066906790689069907090719072907390749075907690779078907990809081908290839084908590869087908890899090909190929093909490959096909790989099
@ifckr.v.0.