(a, b) (f1, f2) (ρ, σ) (c, d) (a, b) (f1, f2) (ρ, σ) (c, d)

(3,6) (2,4) (3,-1) (1,0) (4,12) (3,9) (4,-1) (1,0)

(3,9) (2,6) (5,-1) × (5,10) (2,4) (3,-1) (2,1)

(3,12) (2,8) (7,-1) × (5,10) (3,6) (5,-2) (1,0)

(4,6) (2,3) (2,-1) (1,0) (5,10) (4,8) (7,-3) ×

(4,8) (2,4) (3,-1) × (6,8) (3,4) (3,-2) ×

(4,8) (3,6) (5,-2) × (6,9) (2,3) (2,-1) (2,1)

(4,10) (2,5) (4,-1) × (6,9) (4,6) (5,-3) ×

(4,12) (2,6) (5,-1) × (6,10) (3,5) (2,-1) (1,0)