It's mighty lucky you did say it.
( It ( ( 's ( mighty ( lucky ( you ( did ( say it ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ 's) (ADJP (RB mighty) (JJ lucky) (SBAR (S (NP (PRP you)) (VP (VBD did) (VP (VB say) (NP (PRP it)))))))) (. .)))
Its lucky that you said it.
( Its ( ( lucky ( that ( you ( said it ) ) ) ) . ) )
(ROOT (S (NP (PRP$ Its)) (VP (VBZ lucky) (SBAR (IN that) (S (NP (PRP you)) (VP (VBD said) (NP (PRP it)))))) (. .)))