# input
my (@arr) = (
[ '0-0', '0-1' ],
[ '1-0', '1-1', '1-2', '1-3' ],
[ '2-0', '2-1', '2-2', '2-3' ]
);

# ...

# output
(0,0,0) --> 0-0 1-0 2-0
(0,0,1) --> 0-0 1-0 2-1
(0,0,2) --> 0-0 1-0 2-2
(0,0,3) --> 0-0 1-0 2-3
(0,1,0) --> 0-0 1-1 2-0
(0,1,1) --> 0-0 1-1 2-1
(0,1,2) --> 0-0 1-1 2-2
(0,1,3) --> 0-0 1-1 2-3
(0,2,0) --> 0-0 1-2 2-0
(0,2,1) --> 0-0 1-2 2-1
(0,2,2) --> 0-0 1-2 2-2
(0,2,3) --> 0-0 1-2 2-3
(0,3,0) --> 0-0 1-3 2-0
(0,3,1) --> 0-0 1-3 2-1
(0,3,2) --> 0-0 1-3 2-2 
(0,3,3) --> 0-0 1-3 2-3 
(1,0,0) --> 0-1 1-0 2-0
(1,0,1) --> 0-1 1-0 2-1
(1,0,2) --> 0-1 1-0 2-2
(1,0,3) --> 0-1 1-0 2-3
(1,1,0) --> 0-1 1-1 2-0
(1,1,1) --> 0-1 1-1 2-1
(1,1,2) --> 0-1 1-1 2-2
(1,1,3) --> 0-1 1-1 2-3
(1,2,0) --> 0-1 1-2 2-0
(1,2,1) --> 0-1 1-2 2-1
(1,2,2) --> 0-1 1-2 2-2
(1,2,3) --> 0-1 1-2 2-3
(1,3,0) --> 0-1 1-3 2-0
(1,3,1) --> 0-1 1-3 2-1
(1,3,2) --> 0-1 1-3 2-2 
(1,3,3) --> 0-1 1-3 2-3