members search through numbers

[1master1]

I have seen that in mybb1.6 we can quick search for members in member list by just clicking on alphabets from a to z on top right. but if we have members starting with numbers, how can we search them??

can anyone add that search string too ?  

(0-9) A B C D ..................

Clicking on the (0-9) which is single search must give search results of members starting with numbers in ascending order.

Thanks