This reminds me of a puzzle.

*Layton Logo spins up*



There are six crystals are arranged in a row. There are three red and three blue. The problem is the red crystals are where the blue crystals are suppose to be and vice versa. With one space available and by moving crystals only by jumping another crystal, can you put the crystals in the right spots?



RRRoBBB ---> BBBoRRR (the o is the blank space)