I have a tuple that looks like:  

`t=(('a','b'),('a','c','d','e'),('c','d','e'))`

I need to rearrange it so I have a new tuple that will look like:  

`t2=(('a','b'),('a','c'),('c','d'),('d','e'),('c','d'),('d','e'))`

Basically the new tuple takes pairs (of 2) from each element of the old tuple. But I am not sure how to get started. Thanks for your help.