| 0 | : | b |
| cons | : | [d × e] ⟶ e |
| f | : | [b × b × b] ⟶ a |
| false | : | c |
| filter | : | [d → c × e] ⟶ e |
| filter2 | : | [c × d → c × d × e] ⟶ e |
| g | : | [b] ⟶ b |
| map | : | [d → d × e] ⟶ e |
| nil | : | e |
| s | : | [b] ⟶ b |
| true | : | c |
| X | : | b |
| Y | : | b |
| U | : | b |
| H | : | d → d |
| I | : | d → d |
| P | : | d |
| X1 | : | e |
| Z1 | : | d → c |
| G1 | : | d → c |
| V1 | : | d |
| W1 | : | e |
| J1 | : | d → c |
| X2 | : | d |
| Y2 | : | e |
| G2 | : | d → c |
| V2 | : | d |
| W2 | : | e |
| f(g(X), s(0), Y) | ⇒ | f(g(s(0)), Y, g(X)) |
| g(s(U)) | ⇒ | s(g(U)) |
| g(0) | ⇒ | 0 |
| map(H, nil) | ⇒ | nil |
| map(I, cons(P, X1)) | ⇒ | cons(I · P, map(I, X1)) |
| filter(Z1, nil) | ⇒ | nil |
| filter(G1, cons(V1, W1)) | ⇒ | filter2(G1 · V1, G1, V1, W1) |
| filter2(true, J1, X2, Y2) | ⇒ | cons(X2, filter(J1, Y2)) |
| filter2(false, G2, V2, W2) | ⇒ | filter(G2, W2) |