I am trying to print a bingo card.  The expression I am using is simple.
My result is unexpected:


   |:((<' B '),(<' I '),(< ' N '),(<' G '),(<' O ')),. 3&": L:0 <"0(1 16 31
46 61)+(5?15),.(5?15),.(5?15),.(5?15),.(5?15)
┌───┬───┬───┬───┬───┐
│ B │ I │ N │ G │ O │
├───┼───┼───┼───┼───┤
│  2│ 16│ 44│ 51│ 63│
├───┼───┼───┼───┼───┤
│  5│ 16│ 44│ 55│ 69│
├───┼───┼───┼───┼───┤
│  5│ 24│ 36│ 58│ 61│
├───┼───┼───┼───┼───┤
│ 14│ 21│ 45│ 47│ 61│
├───┼───┼───┼───┼───┤
│ 15│ 18│ 39│ 50│ 68│
└───┴───┴───┴───┴───┘
Furthermore:

  |:((<' B '),(<' I '),(< ' N '),(<' G '),(<' O ')),. 3&": L:0 <"0 c =:(1
16 31 46 61)+(5?15),.(5?15),.(5?15),.(5?15),.(5?15)
┌───┬───┬───┬───┬───┐
│ B │ I │ N │ G │ O │
├───┼───┼───┼───┼───┤
│  6│ 16│ 35│ 49│ 70│
├───┼───┼───┼───┼───┤
│  7│ 29│ 40│ 56│ 62│
├───┼───┼───┼───┼───┤
│  5│ 27│ 41│ 54│ 64│
├───┼───┼───┼───┼───┤
│ 11│ 30│ 44│ 52│ 63│
├───┼───┼───┼───┼───┤
│ 15│ 29│ 43│ 54│ 62│
└───┴───┴───┴───┴───┘
   c
 6  7  5 11 15
16 29 27 30 29
35 40 41 44 43
49 56 54 52 54
70 62 64 63 62


The NuVoc explanation of deal says:

Selects x items <http://code.jsoftware.com/wiki/Vocabulary/AET#Item> at
> random (without repetition) from the list
> <http://code.jsoftware.com/wiki/Vocabulary/AET#List>  i.y


Am I missing something?  Is this a known bug?  I tried googling, but I
failed.

9!:12 ''

6

9!:14 ''

j806/j64avx/windows/beta-3/commercial/www.jsoftware.com/2017-04-10T18:03:23

-- 
Of course I can ride in the carpool lane, officer.  Jesus is my constant
companion.
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