/*  do some function
definitions and calls
in various orders
*/

Keys -> x

F 2 x -> a

a -> Prt
NL

Halt

Def G a b c .

Mult a b -> x
Mult x c -> x

x -> Ret

Def F a b .

Add a 1 -> c
Sub b 1 -> d

G c d 5 -> r

r -> Ret