x-2 x-1 x-2 x-3 2x-2 2x-1 2x-2 2x-3 3x-3 3x-2 4x-5 3x-5 4x 4x-3 5x-7 4x-3c1-c4,c2-c4,c3-c4 1 2 1 x-3 1 2 1 2x-3 2 3 x 3x-5 3 0 x-4 4x-3 r2-r1,r3-2r1,r4-3r11 2 1 x-3 0 0 0 x 0 -1 x-2 x+10 -6 x-7 x+3 r4...