Text filter

Hi,guys.Is there any way to filter a special string group from a list of string?

for example,I have already filter the number manually.And now I need to all inputed string though the Match Text componet to be true.Actuatlly I need the string have "???x???".

In this case,I have no idea the contents and string length before "???x???".but I guess its lenght will be less than 10.But when I type "?"x10 &"???x???"as pattern.It just find the {"?"x10 & "???x???"} groups.Also I try "#" as numberial placeholder,it fail.Please help.