iii iim iio iir iis im- imi imm imo ims io- ioi iom ioo ior ios ir- iri irm iro irr irs is- isi ism iso isr iss m-o m-r mi- mii mim mio mir mis mmi mmm mmo mmr mms moi mom moo mor mos mri mrm mro mrr mrs msi msm mso msr mss o-i oii oim oio oir ois om- omi omm omo omr oms oo- ooi oom ooo oor oos or- ori orm oro orr ors os- osi osm oso osr oss rii rim rio rir ris rmi rmm rmo rmr rms roi rom roo ror ros rri rrm rrr rrs rsi rsm rso rsr rss sii sim sio sir sis smi smm smo smr sms soi som soo sor sos sr- sri srm sro srr srs ss- ssi ssm sso ssr sss