Alternation sounds good, but only if just 34 23 or 39 4b are accepted. From what I gather from the OP, any two pairs of hexadecimal digits could get there. Alternation really isn't the means to the desired end here.

You misread what the OP wrote. Only 34 23 and 39 4b are acceptable.

I want to be able to match both these strings
...16 03 01 34 23 0b.... ...16 03 01 39 4b 0b....

Alternation is what's needed here.

Jim

In reply to Re^3: Creating spacers in regex match by Jim
in thread Creating spacers in regex match by ahuang14

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