What exercises can help my separated stomach muscles?

Twin Mummy questioned:

I had twins 8 months ago and during my pregnancy my stomach muscles separated due to my mass. The sickbay gave me a exercise sheet as I gone but to be reliable including having twins I didn’t get greatly time to do them and I be inflicted including misplaced the sheet. Does anyone admit any excellent exercises or websites including the exercises to aid my stomach muscles.

Thankfulness in enhancement.