-ic bbb bbc bbi bbm bbo bbr bbs bbt bcb bcc bci bcm bco bcr bcs bct bi- bib bic bii bim bio bir bis bit bmb bmc bmi bmm bmo bmr bms bmt bob boc boi bom boo bor bos bot brb bri brm bro brr brs brt bsb bsc bsi bsm bso bsr bss bst btb btc bti btm bto btr bts btt c-- cbb cbc cbi cbm cbo cbr cbs cbt ccb ccc cci ccm cco ccr ccs cct ci- cib cic cii cim cio cir cis cit cmb cmc cmi cmm cmo cmr cms cmt co- cob coc coi com coo cor cos cot crb crc cri crm cro crr crs crt csb csc csi csm cso csr css cst ctb ctc cti ctm cto ctr cts ctt ibb ibc ibi ibm ibo ibr ibs ibt icb icc ici icm ico icr ics ict iib iic iii iim iio iir iis iit im- imb imc imi imm imo ims imt io- iob ioc ioi iom ioo ior ios iot ir- irb irc iri irm iro irr irs irt is- isb isc isi ism iso isr iss ist itb itc iti itm ito its itt m-o m-r mbb mbc mbi mbm mbo mbr mbs mbt mc- mcb mcc mci mcm mco mcr mcs mct mi- mib mic mii mim mio mir mis mit mmb mmc mmi mmm mmo mmr mms mmt mob moc moi mom moo mor mos mot mrb mrc mri mrm mro mrr mrs mrt msb msc msi msm mso msr mss mst mtb mtc mti mtm mto mtr mts mtt o-i ob- obb obc obi obm obo obr obs obt oc- ocb occ oci ocm oco ocr ocs oct oib oic oii oim oio oir ois oit om- omb omc omi omm omo omr oms omt oo- oob ooc ooi oom ooo oor oos oot or- orb orc ori orm oro orr ors ort os- osb osc osi osm oso osr oss ost ot- otb otc oti otm oto otr ots ott rbb rbc rbi rbm rbo rbr rbs rbt rcb rcc rci rcm rco rcr rcs rct rib ric rii rim rio rir ris rit rmb rmc rmi rmm rmo rmr rms rmt rob roc roi rom roo ror ros rot rrb rrc rri rrm rrr rrs rrt rsb rsc rsi rsm rso rsr rss rst rtb rtc rti rtm rto rtr rts rtt sbb sbc sbi sbm sbo sbr sbs sbt scb scc sci scm sco scr scs sct sib sic sii sim sio sir sis sit smb smc smi smm smo smr sms smt sob soc soi som soo sor sos sot sr- srb src sri srm sro srr srs srt ss- ssb ssc ssi ssm sso ssr sss sst stb stc sti stm sto str sts stt tbb tbc tbi tbm tbo tbr tbs tbt tcb tcc tci tcm tco tcr tcs tct tib tic tii tim tio tir tis tit tmb tmc tmi tmm tmo tmr tms tmt to- tob toc toi tom too tor tos tot trb trc tri trm tro trr trs trt tsb tsc tsi tsm tso tsr tss tst ttb ttc tti ttm tto ttr tts ttt