------Input------ 4 2 3 ------Answer----- (2,1) (2,2) (2,3) (2,4) (1,3) (2,3) (3,3) (4,3) (1,2) (2,3) (3,4) (4,1) (3,2) (2,3) (1,4) ------Your output----- (2,1) (2,2) (2,3) (2,4) (1,3) (2,3) (3,3) (4,3) (2,3) (3,4) (4,1) (3,2) (2,3) (1,4)