Formula Help If number ="x" in string of numbers containing commas return "x"

[yield777]

Wanting to search the house district column for a specific district number and return the county name. The formula below works, but returns the county name (Bibb) for 140 and/or 40 instead of for just the district 140 that is being searched for. How can I get it to just pull it for 140 and not 40 or 0, etc? Thank you.

=IF(ISNUMBER(SEARCH($O$2&",",","&D13&",")),A13,0)

County Name	House Districts			District	140
Appling	156, 178		0	0
Atkinson	176		0	0
Bacon	169		0	0
Baker	154		0	0
Baldwin	145		0	0
Banks	28		0	0
Barrow	114, 116, 117		0	0
Bartow	14, 15, 16		0	0
Ben Hill	155		0	0
Berrien	170		0	0
Bibb	140, 141, 142,		Bibb	0

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[BobUmlas]

Search woth leading comma as well:
=IF(ISNUMBER(SEARCH(", " & $O$2&",", ", "&D13&",")),A13,0)
note the change from "," to ", " (ending space)

 

[yield777]

Thanks alot, what does the ", " (with the space) actually tell the formula,a s compared to "',"?