chor 1 2 chor 2 3 mu 1 2 3 chor 3 13 mu 3 2 4 mu 3 4 5 chor 5 12 # o(xyxyy) = o(x.x^(yy)) = 12, so x is in 2B # If o(xyxyxyy) = 12 also, then y is in 3B. mu 3 5 6 chor 6 12