I have a text line matching this pattern d{2}s?[a-zA-Z]s?d{2,5} zero to many times.

I need to remove everything but the matching sequence in pure regex substitution (not using java loops etc)

Examples:

“foo 12a123” –> “12a123“

“12a123 bar” –> “12a123“

“foo 12a123 bar 32A1234 baz” –> “12a123 32A1234“

“12 a123 bar 32A 1234” –> “12 a123 32A 1234“

“foo bar” (no match) –> “”

Any ideas?