Standard Out:

in clause row2col/iooio(cons(X,Xs),cons(cons(X,Ys),Cols),cons(Ys,Cols1),A,B) :- row2col/iooio(Xs,Cols,Cols1,cons(nil,A),B).
  variables have no producer: ["Ys"]

Standard Err:


real	0m0.247s
user	0m0.212s
sys	0m0.028s