x_m := Matrix(Z,3,2,[1,1,2,2,3,3]); RotateRows_(x_m, 1,2,1); x_m; x_m := Matrix(Z,3,2,[1,1,2,2,3,3]); RotateRows_(x_m, 1,3,1); x_m; x_m := Matrix(Z,3,2,[1,1,2,2,3,3]); RotateRows_(x_m, 1,3,2); x_m;