The expression you've written matches exactly one letter, followed by one comma, followed by one whitespace char, followed by one letter. You need to replace "one" with "one or more" using the + modifier:
This also uses * to indicate "zero or more" - I thought that seemed like a safer policy in case people either omit the whitespace, or insert a line break for some reason. Of course you can remove the * if you prefer to require exactly one whitespace character; it's your choice. [ January 09, 2007: Message edited by: Jim Yingst ]
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