they do n't fit well together and 
(ROOT (S (NP (PRP they)) (VP (VBP do) (RB n't) (VP (VB fit) (ADVP (RB well)) (ADVP (RB together)))) (CC and)))
(ROOT (S (NP (PRP )) (VP (VBP ) (RB ) (VP (VB ) (ADVP (RB )) (ADVP (RB )))) (CC )))