Devil Rings

The Devil Rings better known as the Hungarian Rings is a permutation puzzle

The Devil Rings (Hungarian Rings) puzzle consists of two intersecting rings made up of a number of colored balls. The rings of balls intersect at two places, so they share two of the balls. Each ring of balls can be rotated, so the balls can be mixed. The aim is to mix up the balls, and then place the balls back together so the colors form a continuous sequence (as shown in the screen shot for the solved puzzle). Pay special attention to the location of the balls in the solved state(or similar with the colors switched).

There are 38 balls of four colors: two colors have 9 balls (yellow and blue) and two colors have 10 balls (green, red). There are 4 balls between the intersections of the rings. For ways to solve the puzzle there are many tips and strategies just check google.