public class Gavnokod1
{
    final static int N = 6;

    public static void main( String[] args ) {
        for( int row=1; row<=N; row++ )  {
            if( row%2 == 1 ) {
                for( int pos=1; pos<=row; pos++ ) {
                    System.out.print(pos);
                    if(pos!=row)System.out.print("-");
                }
            }
            else
            {
                for( int pos=row; pos>=1; pos-- ) {
                    System.out.print(pos);
                    if(pos!=1)System.out.print("-");
                }
            }
            System.out.println();
        }
    }
}