-ic b-u bbb bbc bbd bbi bbr bbs bbt bbu bcb bcc bcd bci bcr bcs bct bcu bdb bdc bdd bdi bdr bds bdt bdu bi- bib bic bid bii bir bis bit biu brb brd bri brr brs brt bru bsb bsc bsd bsi bsr bss bst bsu btb btc btd bti btr bts btt btu bub buc bud bui bur bus but buu c-- cbb cbc cbd cbi cbr cbs cbt cbu ccb ccc ccd cci ccr ccs cct ccu cdb cdc cdd cdi cdr cds cdt cdu ci- cib cic cid cii cir cis cit ciu crb crc crd cri crr crs crt cru csb csc csd csi csr css cst csu ctb ctc ctd cti ctr cts ctt ctu cub cuc cud cui cur cus cut cuu dbb dbc dbd dbi dbr dbs dbt dbu dcb dcc dcd dci dcr dcs dct dcu ddb ddc ddd ddi ddr dds ddt ddu di- dib dic did dii dir dis dit diu drb drc drd dri drr drs drt dru dsb dsc dsd dsi dsr dss dst dsu dtb dtc dtd dti dtr dts dtt dtu dub duc dud dui dur dus dut i-d ibb ibc ibd ibi ibr ibs ibt ibu icb icc icd ici icr ics ict icu idb idc idd idi idr ids idt idu iib iic iid iii iir iis iit iiu ir- irb irc ird iri irr irs irt iru is- isb isc isd isi isr iss ist isu itb itc itd iti its itt itu iu- iub iuc iud iui iur ius iut rbb rbc rbd rbi rbr rbs rbt rbu rcb rcc rcd rci rcr rcs rct rcu rdb rdc rdd rdi rdr rds rdt rdu rib ric rid rii rir ris rit rrb rrc rrd rri rrr rrs rrt rru rsb rsc rsd rsi rsr rss rst rsu rtb rtc rtd rti rtr rts rtt rtu rub ruc rud rui rur rus rut ruu sbb sbc sbd sbi sbr sbs sbt sbu scb scc scd sci scr scs sct scu sdb sdc sdd sdi sdr sds sdt sdu sib sic sid sii sir sis sit siu sr- srb src srd sri srr srs srt ss- ssb ssc ssd ssi ssr sss sst ssu stb stc std sti str sts stt stu sub suc sud sui sur sus sut suu tbb tbc tbd tbi tbr tbs tbt tbu tcb tcc tcd tci tcr tcs tct tcu tdb tdc tdd tdi tdr tds tdt tdu tib tic tid tii tir tis tit tiu trb trc trd tri trr trs trt tru tsb tsc tsd tsi tsr tss tst tsu ttb ttc ttd tti ttr tts ttt ttu tub tuc tud tui tur tus tut tuu ubb ubc ubi ubr ubs ubt ubu ucb ucc ucd uci ucr ucs uct ucu udb udc udd udi udr uds udt udu uib uic uid uii uir uis uit uiu ur- urb urc urd uri urr urs urt uru usb usc usd usi usr uss ust usu utb utc utd uti utr uts utt utu uuc uur uus uut uuu