i-v iii iin iio iip iis iit in- ini inn ino inp ins int inv io- ioi ion ioo iop ios iot iov ipi ipn ipo ipp ips ipt ipv is- isi isn iso isp iss ist isv iti itn ito itp its itt itv ivi ivo ivp ivs ivt ivv n-i nii nin nio nip nis nit niv nni nnn nno nnp nns nnt nnv no- noi non noo nop nos not nov npi npn npo npp nps npt npv nsi nsn nso nsp nss nst nsv nti ntn nto ntp nts ntt ntv nvi nvn nvp nvt nvv o-i oii oin oio oip ois oit oiv on- oni onn ono onp ons ont oo- ooi oon ooo oop oos oot oov op- opi opn opo opp ops opt opv os- osi osn oso osp oss ost osv ot- oti otn oto otp ots ott otv ov- ovi ovo ovp ovs ovv p-p pii pin pio pip pis pit piv pn- pni pnn pno pnp pns pnt pnv poi pon poo pop pos pot pov ppi ppn ppo ppp pps ppt ppv ps- psi psn pso psp pss pst psv pt- pti ptn pto ptp pts ptt ptv pvi pvn pvo pvp pvs pvt pvv sii sin sio sip sis sit siv sni snn sno snp sns snt snv soi son soo sop sos sot sov spi spn spo spp sps spt spv ss- ssi ssn sso ssp sss sst ssv sti stn sto stp sts stt stv svi svn svo svp svs svt svv tii tin tio tip tis tit tiv tni tnn tno tnp tns tnt to- toi ton too top tos tot tov tpi tpn tpo tpp tps tpt tpv tsi tsn tso tsp tss tst tsv tti ttn tto ttp tts ttt ttv tvi tvn tvo tvp tvs tvt vi- vii vin vio vip vis vit viv vn- vni vno vnp vns vnv voi von voo vop vos vot vov vpi vpn vpo vpp vps vpt vsi vsn vso vsp vss vst vsv vti vto vts vtt vtv vvi vvo vvs vvt vvv