Exercise is for neck stretching.

A lie o spine, under waist put roll, under head are books, legs bended in knees under straight corner, feet on the floor.
Putting big fingers under jaw low, and other fingers are behind ears on occiput, as you are catching head from both sides from a neck side,slowly stretch head, and neck up, as on a direction for neck side a spine, as do not add strong forces and do not lead aches, as on this exedrcise you need to feel recovering in neck, and light in head, soft stretching neck for30 sec, after rest, whole repeats are 3, as head does not move, or doing a micro moves with head,as light turns from sides till side or weak  moves up,and down. As you can open a lid from the bottle like you are putting vertebras on place.