-ji bbb bbi bbo bbr bbs bbt bi- bib bii bij bio bir bis bit bji bjj bjr bjs bjt bob boi boj boo bor bos bot brb bri brj bro brr brs brt bsb bsi bsj bso bsr bss bst btb bti bto btr bts btt ibb ibi ibj ibo ibr ibs ibt iib iii iij iio iir iis iit ijb iji ijo ijs ijt io- iob ioi ioj ioo ior ios iot ir- irb iri irj iro irr irs irt is- isb isi isj iso isr iss ist itb iti itj ito its itt j-i jbi jbj jbo jbr jbs jbt jib jii jij jio jir jis jit jjb jjj jjr jjs job joi joj joo jor jos jot jrb jri jro jrr jrs jrt jsb jsi jsj jso jsr jss jst jtb jti jtr jts jtt o-i ob- obb obi obj obo obr obs obt oib oii oio oir ois oit ojb oji ojo ojs oo- oob ooi ooo oor oos oot or- orb ori oro orr ors ort os- osb osi osj oso osr oss ost ot- otb oti oto otr ots ott rbb rbi rbo rbr rbs rbt rib rii rio rir ris rit rjr rob roi roj roo ror ros rot rrb rri rrr rrs rrt rsb rsi rsj rso rsr rss rst rtb rti rtj rto rtr rts rtt sbb sbi sbj sbo sbr sbs sbt sib sii sij sio sir sis sit sjb sji sjj sjr sjs sjt sob soi soj soo sor sos sot sr- srb sri srj sro srr srs srt ss- ssb ssi ssj sso ssr sss sst stb sti stj sto str sts stt tbb tbi tbj tbo tbr tbs tbt tib tii tio tir tis tit tji tjo tjr tjs to- tob toi toj too tor tos tot trb tri tro trr trs trt tsb tsi tsj tso tsr tss tst ttb tti tto ttr tts ttt