$ f(x)
	@x+2

$ g(x)
	@x+3

:a = &f

:b = &g

3: {f(1)}

3: {a(1)}

5: {g(2)}

4: {a(2)}

4: {b(1)}

5: {f(3)}

13: {b(10)}

7: {a(5)}

8: {g(5)}