-er -ic b-u bbb bbc bbe bbi bbk bbo bbq bbr bbu bbx bcb bcc bce bci bck bco bcq bcr bcu bcx be- beb bec bee bei bek beo beq ber beu bex bi- bib bic bie bii bik bio bir biu bix bkb bkc bke bkk bko bkq bkr bkx bob boc boe boi bok boo boq bor bou box bqc bqe brb bre bri brk bro brq brr bru brx bub buc bue bui buk buo bur buu bux bxb bxi bxo bxq bxx c-- cbb cbc cbe cbi cbk cbo cbq cbr cbu cbx ccb ccc cce cci cck cco ccr ccu ccx ce- ceb cec cee cei cek ceo ceq cer ceu cex ci- cib cic cie cii cik cio ciq cir ciu cix ckb ckc cki cko ckx co- cob coc coe coi cok coo coq cor cou cox cqb cqc cqi cqo crb crc cre cri crk cro crq crr cru crx cub cuc cue cui cuk cuo cuq cur cuu cxc cxi cxk cxo cxr cxx ebb ebc ebe ebi ebk ebo ebq ebr ebu ebx ec- ecb ecc ece eci eck eco ecq ecr ecu ecx eeb eec eee eek eeo eer eex eib eic eie eii eik eio eir eiu eix ekb ekc eke eki eko ekr eku eo- eob eoc eoe eoi eok eoo eoq eor eou eqe eqq equ erb erc ere eri erk ero erq err eru eu- eub euc eue eui eur eux ex- exc exe exi exo exr exu exx ibb ibc ibe ibi ibk ibo ibr ibu ibx icb icc ice ici ick ico icq icr icu ie- iec iee iei iek ier iex iib iic iie iii iio iir iiu iix ikb ikc ike iki ikk iko ikr iku ikx io- iob ioc ioe ioi ioo ior iou iqc iqe iqu ir- irb irc ire iri irk iro irq irr iru irx iu- iub iuc iue iui iur ixc ixe ixi kbb kbc kbe kbi kbk kbo kbr kbu kbx kcb kcc kce kci kck kcr kcu kcx ke- keb kec kee kei kek keo ker kex kib kic kie kii kik kio kir kiu kix kkb kkc kke kki kkk kkr kku kob koc koe koi kok koo kor kou krc kri krk kro krr kru kub kuc kue kui kuk kur kuu kxo o-i ob- obb obc obe obi obk obo obr obu obx oc- ocb occ oci ock oco ocr ocu ocx oeb oec oee oei oeo oer oex oib oic oie oii oik oio oir oiu okb okc oke oki okk oko okr oku oo- oob ooc ooi ook ooo oor oox oqb oqo or- orb orc ore ori ork oro orr oru orx ou- ouc oue oui ouk ouo our ox- oxb oxc oxi oxo oxx qbc qbe qbq qcc qci qco qec qee qeo qex qic qie qik qio qir qiu qix qki qoi qoo qor qqk qqq qqu qrb qrc qre qri qru qu- que qui quo qur qux qxe rbb rbc rbe rbi rbk rbo rbr rbu rbx rcb rcc rce rci rco rcr rcu rcx re- reb rec ree rei rek reo req rer reu rex rib ric rie rii rik rio riq rir rix rkb rkc rke rkk rko rku rob roc roe roi rok roo ror rou rox rqc rrb rrc rri rrk rrq rrr rru rub ruc rue rui ruk ruo rur ruu rux rxr ubb ubc ube ubi ubk ubo ubr ubu ubx ucb ucc uce uci uck uco ucr ucu ueb uec uee uei uer uib uic uie uii uio uiq uir uiu ukb ukc uke uki ukk ukr uku uob uoc uoe uok uoo uor uox ur- urb urc ure uri urk uro urr uru urx uuc uue uur uuu uxb uxc uxo uxr uxu xbc xbe xbr xbx xcb xci xcr xcx xee xeq xer xeu xex xic xie xii xio xiu xix xkb xke xoc xoi xok xoo xor xox xrc xrx xue xui xxi xxo xxx