( ( ( ( ( ( ( Electric ( tooth brushes ) ) , ) ( small ( tooth brushes ) ) ) , ) or ) ( water pics ) ) ( ( can ( be ( used ( to ( reach ( difficult areas ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Electric) (NN tooth) (NNS brushes)) (, ,) (NP (JJ small) (NN tooth) (NNS brushes)) (, ,) (CC or) (NP (NN water) (NNS pics))) (VP (MD can) (VP (VB be) (VP (VBN used) (S (VP (TO to) (VP (VB reach) (NP (JJ difficult) (NNS areas)))))))) (. .)))
Electric tooth brushes, small tooth brushes, or water pics can be used to reach difficult areas.
(ROOT (S (NP (PRP It)) (VP (MD would) (VP (VB help) (NP (JJ conserve) (NN water)) (S (VP (TO to) (VP (VB turn) (PRT (RP off)) (NP (NN water)) (PP (IN while) (S (VP (VBG brushing) (NP (NNS teeth)))))))))) (. .)))
It would help conserve water to turn off water while brushing teeth.