Hey Guys,

I do not see how to apply pattern matching to this problem. 
Using for/list as below makes the most sense to me and I do not see how to 
fit in pattern matching

; [List-of [List-of String]] -> [List-of Natural]
; produces list of number of Strings per item in a llos
(check-expect (words-on-line empty) empty)
(check-expect (words-on-line (list empty)) (list 0))
(check-expect (words-on-line (list (list "22" "rr" "ff") (list "22" "rr"))) 
(list 3 2))

(define (words-on-line llos)
  (for/list ((los llos))
    (length los)))

Can I get a hint?

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