-er -ic b-u bbb bbc bbe bbi bbo bbr bbs bbt bbu bbx bcb bcc bce bci bco bcr bcs bct bcu bcx be- beb bec bee bei beo ber bes bet beu bex bi- bib bic bie bii bio bir bis bit biu bix bob boc boe boi boo bor bos bot bou box brb bre bri bro brr brs brt bru brx bsb bsc bse bsi bso bsr bss bst bsu bsx btb btc bte bti bto btr bts btt btu btx bub buc bue bui buo bur bus but buu bux bxb bxi bxo bxx c-- cbb cbc cbe cbi cbo cbr cbs cbt cbu cbx ccb ccc cce cci cco ccr ccs cct ccu ccx ce- ceb cec cee cei ceo cer ces cet ceu cex ci- cib cic cie cii cio cir cis cit ciu cix co- cob coc coe coi coo cor cos cot cou cox crb crc cre cri cro crr crs crt cru crx csb csc cse csi cso csr css cst csu csx ctb ctc cte cti cto ctr cts ctt ctu ctx cub cuc cue cui cuo cur cus cut cuu cxc cxi cxo cxr cxs cxt cxx ebb ebc ebe ebi ebo ebr ebs ebt ebu ebx ec- ecb ecc ece eci eco ecr ecs ect ecu ecx eeb eec eee eeo eer ees eet eex eib eic eie eii eio eir eis eit eiu eix eo- eob eoc eoe eoi eoo eor eos eot eou erb erc ere eri ero err ers ert eru es- esb esc ese esi eso esr ess est esu esx etb etc ete eti eto etr ets ett etu etx eu- eub euc eue eui eur eus eut eux ex- exc exe exi exo exr exs ext exu exx ibb ibc ibe ibi ibo ibr ibs ibt ibu ibx icb icc ice ici ico icr ics ict icu ie- iec iee iei ier ies iet iex iib iic iie iii iio iir iis iit iiu iix io- iob ioc ioe ioi ioo ior ios iot iou ir- irb irc ire iri iro irr irs irt iru irx is- isb isc ise isi iso isr iss ist isu itb itc ite iti ito its itt itu itx iu- iub iuc iue iui iur ius iut ixc ixe ixi o-i ob- obb obc obe obi obo obr obs obt obu obx oc- ocb occ oci oco ocr ocs oct ocu ocx oeb oec oee oei oeo oer oes oet oex oib oic oie oii oio oir ois oit oiu oo- oob ooc ooi ooo oor oos oot oox or- orb orc ore ori oro orr ors ort oru orx os- osb osc ose osi oso osr oss ost osu osx ot- otb otc ote oti oto otr ots ott otu ou- ouc oue oui ouo our ous out ox- oxb oxc oxi oxo oxt oxx rbb rbc rbe rbi rbo rbr rbs rbt rbu rbx rcb rcc rce rci rco rcr rcs rct rcu rcx re- reb rec ree rei reo rer res ret reu rex rib ric rie rii rio rir ris rit rix rob roc roe roi roo ror ros rot rou rox rrb rrc rri rrr rrs rrt rru rsb rsc rse rsi rso rsr rss rst rsu rsx rtb rtc rte rti rto rtr rts rtt rtu rtx rub ruc rue rui ruo rur rus rut ruu rux rxr rxs sbb sbc sbe sbi sbo sbr sbs sbt sbu sbx scb scc sce sci sco scr scs sct scu scx se- seb sec see sei seo ser ses set seu sex sib sic sie sii sio sir sis sit siu six sob soc soe soi soo sor sos sot sou sox sr- srb src sre sri sro srr srs srt srx ss- ssb ssc sse ssi sso ssr sss sst ssu ssx stb stc ste sti sto str sts stt stu stx sub suc sue sui suo sur sus sut suu sux sxc sxi sxs sxt sxu t-x tbb tbc tbe tbi tbo tbr tbs tbt tbu tcb tcc tce tci tco tcr tcs tct tcu tcx te- teb tec tee tei teo ter tes tet teu tex tib tic tie tii tio tir tis tit tiu tix to- tob toc toe toi too tor tos tot tou tox trb trc tre tri tro trr trs trt tru trx tsb tsc tse tsi tso tsr tss tst tsu tsx ttb ttc tte tti tto ttr tts ttt ttu ttx tub tuc tue tui tuo tur tus tut tuu tux txe txi txs txt txu ubb ubc ube ubi ubo ubr ubs ubt ubu ubx ucb ucc uce uci uco ucr ucs uct ucu ueb uec uee uei uer ues uet uib uic uie uii uio uir uis uit uiu uob uoc uoe uoo uor uos uot uox ur- urb urc ure uri uro urr urs urt uru urx usb usc use usi uso usr uss ust usu usx utb utc ute uti uto utr uts utt utu utx uuc uue uur uus uut uuu uxb uxc uxo uxr uxt uxu xbc xbe xbr xbx xcb xci xcr xcx xee xer xes xet xeu xex xic xie xii xio xis xit xiu xix xoc xoi xoo xor xos xot xox xrc xrt xrx xsb xsc xsi xss xst xtc xti xtr xts xtx xue xui xus xxi xxo xxx