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of the group:
*no change (), a group element of order 1
*interchanging two blocks: (RG), (RB), (GB), three group elements of order 2
*a cyclic permutation of all three blocks: (RGB), (RBG), two group elements of order 3

For example, (RG) and (RB) are both of the form (x y); a permutation of the letters R, G, and B (namely (GB)) changes the notation (RG) into (RB). Therefore, if we apply (GB), then (RB), and then the inverse of (GB), which is also (GB), the resulting permutation

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