in with your best fingers , four flats could march .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 in) (PP_2 (IN_0 with) (NP_3 (ATNP_0 (PRPDOLLAR_0 your) (JJS_0 best)) (NNS_0 fingers)))) (COMMA_0 ,)) (NP_0 (CD_0 four) (NNS_0 flats))) (VP_3 (MD_0 could) (VP_1 (VB_0 march)))) (DOT_0 .)))