iii iio iir iis iit io- ioi ioo ior ios iot ir- iri iro irr irs irt is- isi iso isr iss ist iti ito its itt o-i oii oio oir ois oit oo- ooi ooo oor oos oot or- ori oro orr ors ort os- osi oso osr oss ost ot- oti oto otr ots ott rii rio rir ris rit roi roo ror ros rot rri rrr rrs rrt rsi rso rsr rss rst rti rto rtr rts rtt sii sio sir sis sit soi soo sor sos sot sr- sri sro srr srs srt ss- ssi sso ssr sss sst sti sto str sts stt tii tio tir tis tit to- toi too tor tos tot tri tro trr trs trt tsi tso tsr tss tst tti tto ttr tts ttt