import java.util.*;

class Phone {
    
    public static void main (String[] args) { 
	
	Random spud = new Random();
	
	System.out.println("\nRandom phone-numbers\n\n");

	for (int i = 0; i<39; i++) {
	    
	    for (int j = 0; j<7; j++) {

		int digit = Math.abs( spud.nextInt() % 10);

		if (j == 3) {
		    System.out.print( "-" );
		}

		System.out.print( digit );

	    }

	    if (i % 3 == 2) {
		System.out.println("");
	    }
	    else {
		System.out.print("    ");
	    }
	}

	System.out.println("\n\n");
    }
}