The coordinattes of $n$ points are given on a plane. Print them in increasing order of their abscissa. In the case of a tie, sort the points in decreasing order of ordinate. \InputFile Each line contains the pair of numbers $x, y~(0 \le x, y \le 10^9)$ --- the coordinates of one point. \OutputFile Print the points in the required order. Print the coordinates of each point on a separate line.