Triangles

Each triangle is generated from two numbers: one for the size and
another for the symbol.  Here are two examples:

size 5, symbol 7
7
77
777
7777
77777

size 6, symbol 0
0
00
000
0000
00000
000000

Input
-----

The input contains several instances, each on a separate line.
There is at least one instance.  Each line contains a size
(between 1 and 20, inclusive) and a symbol (between 0 and 9, inclusive).
The last line of the input is 0 0.

Output
------

See sample output below.  There should be no blank spaces at the ends
of the lines.  The output for successive instances should be separated
by a single blank line (but there should be no blank line after the
last triangle).

Sample Input
------------

5 7
6 0
0 0

Output for Sample Input
-----------------------

size 5, symbol 7
7
77
777
7777
77777

size 6, symbol 0
0
00
000
0000
00000
000000