21
*sentence*: time *current-position*: 1
*constituents*:
NOUN1: NOUN "time" from 0 to 1
VERB1: VERB "time" from 0 to 1
NP1: NP NOUN1 by rule G-NP1 from 0 to 1
VP1: VP VERB1 by rule G-VP1 from 0 to 1
*active-arcs*:
ARC1: S NP1 • VP by rule G-S1 from 0 to 1
ARC2: S VERB1 • NP by rule G-S2 from 0 to 1
ARC3: VP VERB1 • PP by rule G-VP2 from 0 to 1

*sentence*: time flies *current-position*: 2
*constituents*: add
NOUN2: NOUN "flies" from 1 to 2
VERB2: VERB "flies" from 1 to 2
NP2: NP NOUN2 by rule TF-NP1 from 1 to 2
VP2: VP VERB2 by rule G-VP1 from 1 to 2
S1: S VERB1 NP2 by rule G-S2 from ARC2 from 0 to 2
S2: S NP1 VP2 by rule G-S1 from ARC1 from 0 to 2
*active-arcs*: add
ARC4: S NP2 • VP by rule G-S1 from 1 to 2
ARC5: S VERB2 • NP by rule G-S2 from 1 to 2
ARC6: VP VERB2 • PP by rule G-VP2 from 1 to 2

Full parses:
(S (NP (NOUN "time")) (VP (VERB "flies")))
(S (VERB "time") (NP (NOUN "flies")))