It was definitely confusing Roger.

"Roger Govier" wrote in message
...
Bob, I had thought about -4 rather than -1, but his example of
Jul 07 Jun 07
Feb 08 Mar 08
etc.

rather threw all options, so I had decided his examples were not real.

You are probably correct though, and he may just have missed out one of
his months in the second set of values

--
Regards

Roger Govier