-ic b-u bbb bbc bbi bbm bbs bbt bbu bcb bcc bci bcm bcs bct bcu bi- bib bic bii bim bis bit biu bmb bmc bmi bmm bms bmt bmu bsb bsc bsi bsm bss bst bsu btb btc bti btm bts btt btu bub buc bui bum bus but buu c-- cbb cbc cbi cbm cbs cbt cbu ccb ccc cci ccm ccs cct ccu ci- cib cic cii cim cis cit ciu cmb cmc cmi cmm cms cmt cmu csb csc csi csm css cst csu ctb ctc cti ctm cts ctt ctu cub cuc cui cum cus cut cuu ibb ibc ibi ibm ibs ibt ibu icb icc ici icm ics ict icu iib iic iii iim iis iit iiu im- imb imc imi imm ims imt imu is- isb isc isi ism iss ist isu itb itc iti itm its itt itu iu- iub iuc iui ium ius iut mbb mbc mbi mbm mbs mbt mbu mc- mcb mcc mci mcm mcs mct mcu mi- mib mic mii mim mis mit miu mmb mmc mmi mmm mms mmt mmu msb msc msi msm mss mst msu mtb mtc mti mtm mts mtt mtu mub muc mui mum mus mut muu sbb sbc sbi sbm sbs sbt sbu scb scc sci scm scs sct scu sib sic sii sim sis sit siu smb smc smi smm sms smt smu ss- ssb ssc ssi ssm sss sst ssu stb stc sti stm sts stt stu sub suc sui sum sus sut suu tbb tbc tbi tbm tbs tbt tbu tcb tcc tci tcm tcs tct tcu tib tic tii tim tis tit tiu tmb tmc tmi tmm tms tmt tmu tsb tsc tsi tsm tss tst tsu ttb ttc tti ttm tts ttt ttu tub tuc tui tum tus tut tuu ubb ubc ubi ubs ubt ubu ucb ucc uci ucm ucs uct ucu uib uic uii uim uis uit uiu um- umb umc umi umm ums umt umu usb usc usi usm uss ust usu utb utc uti utm uts utt utu uuc uum uus uut uuu