-er -ic b-u bbb bbc bbe bbi bbo bbr bbt bbu bbx bcb bcc bce bci bco bcr bct bcu bcx be- beb bec bee bei beo ber bet beu bex bi- bib bic bie bii bio bir bit biu bix bob boc boe boi boo bor bot bou box brb bre bri bro brr brt bru brx btb btc bte bti bto btr btt btu btx bub buc bue bui buo bur but buu bux bxb bxi bxo bxx c-- cbb cbc cbe cbi cbo cbr cbt cbu cbx ccb ccc cce cci cco ccr cct ccu ccx ce- ceb cec cee cei ceo cer cet ceu cex ci- cib cic cie cii cio cir cit ciu cix co- cob coc coe coi coo cor cot cou cox crb crc cre cri cro crr crt cru crx ctb ctc cte cti cto ctr ctt ctu ctx cub cuc cue cui cuo cur cut cuu cxc cxi cxo cxr cxt cxx ebb ebc ebe ebi ebo ebr ebt ebu ebx ec- ecb ecc ece eci eco ecr ect ecu ecx eeb eec eee eeo eer eet eex eib eic eie eii eio eir eit eiu eix eo- eob eoc eoe eoi eoo eor eot eou erb erc ere eri ero err ert eru etb etc ete eti eto etr ett etu etx eu- eub euc eue eui eur eut eux ex- exc exe exi exo exr ext exu exx ibb ibc ibe ibi ibo ibr ibt ibu ibx icb icc ice ici ico icr ict icu ie- iec iee iei ier iet iex iib iic iie iii iio iir iit iiu iix io- iob ioc ioe ioi ioo ior iot iou ir- irb irc ire iri iro irr irt iru irx itb itc ite iti ito itt itu itx iu- iub iuc iue iui iur iut ixc ixe ixi o-i ob- obb obc obe obi obo obr obt obu obx oc- ocb occ oci oco ocr oct ocu ocx oeb oec oee oei oeo oer oet oex oib oic oie oii oio oir oit oiu oo- oob ooc ooi ooo oor oot oox or- orb orc ore ori oro orr ort oru orx ot- otb otc ote oti oto otr ott otu ou- ouc oue oui ouo our out ox- oxb oxc oxi oxo oxt oxx rbb rbc rbe rbi rbo rbr rbt rbu rbx rcb rcc rce rci rco rcr rct rcu rcx re- reb rec ree rei reo rer ret reu rex rib ric rie rii rio rir rit rix rob roc roe roi roo ror rot rou rox rrb rrc rri rrr rrt rru rtb rtc rte rti rto rtr rtt rtu rtx rub ruc rue rui ruo rur rut ruu rux rxr t-x tbb tbc tbe tbi tbo tbr tbt tbu tcb tcc tce tci tco tcr tct tcu tcx te- teb tec tee tei teo ter tet teu tex tib tic tie tii tio tir tit tiu tix to- tob toc toe toi too tor tot tou tox trb trc tre tri tro trr trt tru trx ttb ttc tte tti tto ttr ttt ttu ttx tub tuc tue tui tuo tur tut tuu tux txe txi txt txu ubb ubc ube ubi ubo ubr ubt ubu ubx ucb ucc uce uci uco ucr uct ucu ueb uec uee uei uer uet uib uic uie uii uio uir uit uiu uob uoc uoe uoo uor uot uox ur- urb urc ure uri uro urr urt uru urx utb utc ute uti uto utr utt utu utx uuc uue uur uut uuu uxb uxc uxo uxr uxt uxu xbc xbe xbr xbx xcb xci xcr xcx xee xer xet xeu xex xic xie xii xio xit xiu xix xoc xoi xoo xor xot xox xrc xrt xrx xtc xti xtr xtx xue xui xxi xxo xxx