The term 'AND SO IT ___' can be completed with the words 'GOES' (4 letters) and 'BEGINS' (6 letters). The phrase 'And so it goes' is a popular idiom used to express resignation or acceptance of a situation. It is often used to indicate that something is inevitable or unavoidable, and is usually said in a resigned or fatalistic manner. The phrase 'And so it begins' is also an idiom, which is used to express the start of something, usually something that is expected to be difficult or challenging.