(def print (x) () (sys 1 x))
(def printc (c) () (sys 2 c))
(def nl () () (sys 2 10))
(def space () () (sys 2 32))
(def not (b) () (if b 0 1))
(def != (a b) () (not (= a b)))
(def <= (a b) () (not (> a b)))
(def >= (a b) () (not (< a b)))
(def nop () () (0))