Displaying only data matching a pattern?

[Kevin D. Clark]

kenta writes:

> Otherwise, I want as an end result:
> 
> A1234567890B
> C9234567890E
> A8234567890B
> F7234567890D

How about?:

 sed 's/^[a-zA-Z0-9][a-zA-Z0-9]*:\([A-Z][0-9][0-9]*[A-Z]\).*/\1/'

I've made the regexp here a little bit tight in order to prevent false
positives.

Regards,

--kevin
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