一個0也不讀的數:

900009999

990009990

999009900

999909000

999990000

只讀一個0的數:

900099990

909999000

909909900

909009990

990099900

990009099

990000999

990909900

990999000

900999900

900909990

999009090

999009009

999099000

999900900

999900090

999900009

讀出三個0的數:

909090990

909090099

909099090

909099009

900990909

990900909