(
    (mkbf r7)
    (:r)(ld r0 @cin (eof? (j :q)))
        (ld @cout r0)
        (cmp r0 '\n' (eq? (j :q)))
        (bfpush @r7 r0)
        (j :r)
    (:q)(bfpop @cout @r7 (nem? (j :q)))
    (ld @cout '\n')
)