ldl++(3)> query h_code(X,Y)
query h_code(X,Y)
Querying : h_code(X,Y) ...
(a, 4)
(b, 2)
(c, 7)
(d, 8)
((b, a), 6)
(((b, a), c), 13)
((d, ((b, a), c)), 21)
The number of records is 7.
ldl++(4)>