iii iin iio iip iir iis iki ikk iko ikr iks in- ini ink inn ino inp inr ins io- ioi ion ioo iop ior ios ipi ipn ipo ipp ipr ips ir- iri irk irn iro irp irr irs is- isi isk isn iso isp isr iss kii kik kin kio kip kir kis kki kkk kkn kkp kkr kks kn- kni knk knn kno knp knr koi kok kon koo kop kor kos kpi kpk kpn kpo kpp kpr kps kri krk krn kro krp krr krs ksi ksk ksn kso ksp ksr kss n-i nii nik nin nio nip nir nis nki nkk nkn nko nkp nkr nks nni nnk nnn nno nnp nns no- noi nok non noo nop nor nos npi npn npo npp npr nps nri nrk nrn nro nrp nrr nrs nsi nsk nsn nso nsp nsr nss o-i oii oik oin oio oip oir ois oki okk oko okp okr oks on- oni onk onn ono onp onr ons oo- ooi ook oon ooo oop oor oos op- opi opk opn opo opp opr ops or- ori ork orn oro orp orr ors os- osi osk osn oso osp osr oss p-p pii pik pin pio pip pir pis pki pkn pko pkp pkr pks pn- pni pnk pnn pno pnp pnr pns poi pok pon poo pop por pos ppi ppk ppn ppo ppp ppr pps pri prk prn pro prp prr prs ps- psi psk psn pso psp psr pss rii rik rin rio rip rir ris rkk rko rkp rks rni rnn rno rnp rnr rns roi rok ron roo rop ror ros rpi rpk rpn rpo rpp rpr rps rri rrk rrn rrp rrr rrs rsi rsk rsn rso rsp rsr rss sii sik sin sio sip sir sis sk- ski skk sko skp skr sks sni snk snn sno snp snr sns soi sok son soo sop sor sos spi spk spn spo spp spr sps sr- sri srk srn sro srp srr srs ss- ssi ssk ssn sso ssp ssr sss