Yep, point taken, if as your later post does, a blank set of inputs is mean to output for example 'Intron' with nothing after it then mine fails.

Mine just prints nothing if there is no data for the input line. I didn't know which way is correct, because I lost some of the example code due to to some lovely DB errors this site keeps throwing me.

also, you don't need to escape semi-colon (;).

Ahh the wonders of being an incompetent novice, I'd say it doesn't hurt, but no doubt you'll give me an example of when it can :)

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