An example of the level of interaction currently supported is:
-`l0> p(Z, Z).`
-`Program stored.`
-`l0> ?- p(Z, Z).`
-`yes`
-`l0> ?- p(Z, z).`
-`yes`
-`l0> ?- p(Z, w).`
-`yes`
-`l0> ?- p(z, w).`
-no
-`l0> ?- p(w, w).`
-`yes`
-`l0> ?- p(Z, w).`
-`yes`
-`l0> ?- p(Z, h(Z, W), f(W)).`
-`no`
-`l0> p(Z, h(Z, W), f(W)).`
-`Program stored.`
-`l0> ?- p(z, h(z, z), f(w)).`
-`no`
-`l0> ?- p(z, h(z, w), f(w)).`
-`yes`
-`l0> ?- p(Z, h(z, W), f(w)).`
-`yes`
-`l0> ?- p(z, h(Z, w), f(w)).`
-`yes`
-`l0> quit`
\ No newline at end of file
+` l0> p(Z, Z).
+ Program stored.
+ l0> ?- p(Z, Z).
+ yes
+ l0> ?- p(Z, z).
+ yes
+ l0> ?- p(Z, w).
+ yes
+ l0> ?- p(z, w).
+ no
+ l0> ?- p(w, w).
+ yes
+ l0> ?- p(Z, w).
+ yes
+ l0> ?- p(Z, h(Z, W), f(W)).
+ no
+ l0> p(Z, h(Z, W), f(W)).
+ Program stored.
+ l0> ?- p(z, h(z, z), f(w)).
+ no
+ l0> ?- p(z, h(z, w), f(w)).
+ yes
+ l0> ?- p(Z, h(z, W), f(w)).
+ yes
+ l0> ?- p(z, h(Z, w), f(w)).
+ yes
+ l0> quit`
\ No newline at end of file