-ic b-u bbb bbc bbd bbi bbk bbr bbs bbt bbu bcb bcc bcd bci bck bcr bcs bct bcu bdb bdc bdd bdi bdk bdr bds bdt bdu bi- bib bic bid bii bik bir bis bit biu bkb bkc bkk bkr bks bkt brb brd bri brk brr brs brt bru bsb bsc bsd bsi bsk bsr bss bst bsu btb btc btd bti btk btr bts btt btu bub buc bud bui buk bur bus but buu c-- cbb cbc cbd cbi cbk cbr cbs cbt cbu ccb ccc ccd cci cck ccr ccs cct ccu cdb cdc cdd cdi cdk cdr cds cdt cdu ci- cib cic cid cii cik cir cis cit ciu ckb ckc ckd cki cks ckt crb crc crd cri crk crr crs crt cru csb csc csd csi csk csr css cst csu ctb ctc ctd cti ctk ctr cts ctt ctu cub cuc cud cui cuk cur cus cut cuu dbb dbc dbd dbi dbk dbr dbs dbt dbu dcb dcc dcd dci dck dcr dcs dct dcu ddb ddc ddd ddi ddk ddr dds ddt ddu di- dib dic did dii dik dir dis dit diu dkb dkc dki dkk dkr dks dkt dku drb drc drd dri drk drr drs drt dru dsb dsc dsd dsi dsk dsr dss dst dsu dtb dtc dtd dti dtk dtr dts dtt dtu dub duc dud dui duk dur dus dut i-d ibb ibc ibd ibi ibk ibr ibs ibt ibu icb icc icd ici ick icr ics ict icu idb idc idd idi idk idr ids idt idu iib iic iid iii iir iis iit iiu ikb ikc iki ikk ikr iks ikt iku ir- irb irc ird iri irk irr irs irt iru is- isb isc isd isi isk isr iss ist isu itb itc itd iti itk its itt itu iu- iub iuc iud iui iur ius iut k-t kbb kbc kbd kbi kbk kbr kbs kbu kcb kcc kcd kci kck kcr kcs kct kcu kdb kdc kdk kdr kds kdt kdu kib kic kid kii kik kir kis kit kiu kkb kkc kki kkk kkr kks kkt kku krc krd kri krk krr krs krt kru ksb ksc ksd ksi ksk ksr kss kst ksu ktb ktc ktk ktr kts ktt ktu kub kuc kud kui kuk kur kus kut kuu rbb rbc rbd rbi rbk rbr rbs rbt rbu rcb rcc rcd rci rcr rcs rct rcu rdb rdc rdd rdi rdr rds rdt rdu rib ric rid rii rik rir ris rit rkb rkc rkk rks rkt rku rrb rrc rrd rri rrk rrr rrs rrt rru rsb rsc rsd rsi rsk rsr rss rst rsu rtb rtc rtd rti rtk rtr rts rtt rtu rub ruc rud rui ruk rur rus rut ruu sbb sbc sbd sbi sbk sbr sbs sbt sbu scb scc scd sci sck scr scs sct scu sdb sdc sdd sdi sdk sdr sds sdt sdu sib sic sid sii sik sir sis sit siu sk- skb skc skd ski skk skr sks skt sku sr- srb src srd sri srk srr srs srt ss- ssb ssc ssd ssi ssk ssr sss sst ssu stb stc std sti stk str sts stt stu sub suc sud sui suk sur sus sut suu tbb tbc tbd tbi tbk tbr tbs tbt tbu tcb tcc tcd tci tck tcr tcs tct tcu tdb tdc tdd tdi tdk tdr tds tdt tdu tib tic tid tii tik tir tis tit tiu tkb tkc tkk tkr tks tkt trb trc trd tri trk trr trs trt tru tsb tsc tsd tsi tsk tsr tss tst tsu ttb ttc ttd tti ttk ttr tts ttt ttu tub tuc tud tui tuk tur tus tut tuu ubb ubc ubi ubk ubr ubs ubt ubu ucb ucc ucd uci uck ucr ucs uct ucu udb udc udd udi udk udr uds udt udu uib uic uid uii uir uis uit uiu ukb ukc uki ukk ukr uku ur- urb urc urd uri urk urr urs urt uru usb usc usd usi usk usr uss ust usu utb utc utd uti utk utr uts utt utu uuc uur uus uut uuu