Trouble with an apparently simple filter

[Terry]

Below is a simple filter i'm trying to construct, any help would be greatly appreciated.

Thanks
Terry


Trial Input
<b>
12345
qwertya
qwertyb
qwertyc
</b>
<b>
23456
qwertyd
qwertye
qwertyf
</b>

Trial Output:
12345, qwertya
12345, qwertyb
12345, qwertyc
23456, quertyd
23456, quertyf
23456, quertyg