import std.stdio;
import std.algorithm;
import std.range;

void main() {
  writeln("Hello, World!");

  int[] arr1 = [4, 9, 7];
  int[] arr2 = [5, 2, 1, 10];
  int[] arr3 = [6, 8, 3];
  sort(chain(arr1, arr2, arr3));
  writefln("%s\n%s\n%s", arr1, arr2, arr3);
}