https://docs.google.com/presentation/d/1yDXGypcooCoeUa7GD99bYooRU1vBk63lC0G2JEOdTaY/edit?usp=sharing
firstLast6List H sameFirstLastList H makePrimeArrayList makeDoubleArrayList makePiInList H commonEndList sum3List rotateLeft3List reverse3List doubleList