iii iin iio iip iir iis iit in- ini inn ino inp inr ins int io- ioi ion ioo iop ior ios iot ipi ipn ipo ipp ipr ips ipt ir- iri irn iro irp irr irs irt is- isi isn iso isp isr iss ist iti itn ito itp its itt n-i nii nin nio nip nir nis nit nni nnn nno nnp nns nnt no- noi non noo nop nor nos not npi npn npo npp npr nps npt nri nrn nro nrp nrr nrs nrt nsi nsn nso nsp nsr nss nst nti ntn nto ntp ntr nts ntt o-i oii oin oio oip oir ois oit on- oni onn ono onp onr ons ont oo- ooi oon ooo oop oor oos oot op- opi opn opo opp opr ops opt or- ori orn oro orp orr ors ort os- osi osn oso osp osr oss ost ot- oti otn oto otp otr ots ott p-p pii pin pio pip pir pis pit pn- pni pnn pno pnp pnr pns pnt poi pon poo pop por pos pot ppi ppn ppo ppp ppr pps ppt pri prn pro prp prr prs prt ps- psi psn pso psp psr pss pst pt- pti ptn pto ptp ptr pts ptt rii rin rio rip rir ris rit rni rnn rno rnp rnr rns rnt roi ron roo rop ror ros rot rpi rpn rpo rpp rpr rps rpt rri rrn rrp rrr rrs rrt rsi rsn rso rsp rsr rss rst rti rtn rto rtp rtr rts rtt sii sin sio sip sir sis sit sni snn sno snp snr sns snt soi son soo sop sor sos sot spi spn spo spp spr sps spt sr- sri srn sro srp srr srs srt ss- ssi ssn sso ssp ssr sss sst sti stn sto stp str sts stt tii tin tio tip tir tis tit tni tnn tno tnp tnr tns tnt to- toi ton too top tor tos tot tpi tpn tpo tpp tpr tps tpt tri trn tro trp trr trs trt tsi tsn tso tsp tsr tss tst tti ttn tto ttp ttr tts ttt