In the popular puzzle Rubik’s Cube invented in 1974 by Ernő Rubik, each turn of the puzzle faces creates a permutation of the surface colors.
(echo:: @ ᯤ)
In the popular puzzle Rubik’s Cube invented in 1974 by Ernő Rubik, each turn of the puzzle faces creates a permutation of the surface colors.
(echo:: @ ᯤ)