import java.io.IOException;
import java.util.*;

@SuppressWarnings("Duplicates")
public class Test {
    public static void main(String[] args) {
        FastestScanner input = null;
        try {
            input = new FastestScanner(System.in);
            List<List<Integer>> matrix = new ArrayList<>();
            while (!input.endOfStream()) {
                input.readByte();
                ArrayList<Integer> row = new ArrayList<>();
                while (!input.endOfLine()) {
                    Integer next = input.nextInt();
                    if (next != null)
                        row.add(next);
                }
                if (row.size() != 0)
                    matrix.add(row);
            }
            for (List<Integer> matrixRow : matrix) {
                for (Integer matrixColumn : matrixRow) {
                    System.out.print(matrixColumn + " ");
                }
                System.out.println();
            }
        } catch (IOException e) {
            System.out.println("I/O exceptions");
        } catch (NumberFormatException e) {
            System.out.println("Cant parse int!");
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException e) {
                    System.out.println("I/O exceptions");
                }
            }
        }
    }
}