filter

(print (filter (lambda (n) (>= n 8)) '(12 8 5)))

(print (filter even? '(12 8 5 4)))

(print (filter (lambda (n) (> n 10)) '(12 8 5)))

(print (filter (lambda (s) (string=? s "Nairobi")) '("Nairobi" "Kisumu")))