iii iim iio iis iki ikk iko iks im- imi imm imo ims io- ioi iom ioo ios is- isi isk ism iso iss kii kik kim kio kis kki kkk kkm kks kmi kmk kmm kmo kms koi kok kom koo kos ksi ksk ksm kso kss m-o mi- mii mik mim mio mis mkk mkm mko mks mmi mmk mmm mmo mms moi mok mom moo mos msi msk msm mso mss o-i oii oik oim oio ois oki okk oko oks om- omi omm omo oms oo- ooi ook oom ooo oos os- osi osk osm oso oss sii sik sim sio sis sk- ski skk skm sko sks smi smk smm smo sms soi sok som soo sos ss- ssi ssk ssm sso sss