-er -ic b-u bbb bbc bbe bbi bbk bbn bbo bbr bbs bbt bbu bcb bcc bce bci bck bcn bco bcr bcs bct bcu be- beb bec bee bei bek ben beo ber bes bet beu bi- bib bic bie bii bik bin bio bir bis bit biu bkb bkc bke bkk bkn bko bkr bks bkt bnb bnc bne bni bnk bnn bno bnr bns bnt bnu bob boc boe boi bok bon boo bor bos bot bou brb bre bri brk brn bro brr brs brt bru bsb bsc bse bsi bsk bsn bso bsr bss bst bsu btb btc bte bti btk btn bto btr bts btt btu bub buc bue bui buk bun buo bur bus but buu c-- cbb cbc cbe cbi cbk cbn cbo cbr cbs cbt cbu ccb ccc cce cci cck ccn cco ccr ccs cct ccu ce- ceb cec cee cei cek cen ceo cer ces cet ceu ci- cib cic cie cii cik cin cio cir cis cit ciu ckb ckc cki cko cks ckt cn- cnb cnc cne cni cnn cno cnr cns cnt cnu co- cob coc coe coi cok con coo cor cos cot cou crb crc cre cri crk crn cro crr crs crt cru csb csc cse csi csk csn cso csr css cst csu ctb ctc cte cti ctk ctn cto ctr cts ctt ctu cub cuc cue cui cuk cun cuo cur cus cut cuu ebb ebc ebe ebi ebk ebn ebo ebr ebs ebt ebu ec- ecb ecc ece eci eck ecn eco ecr ecs ect ecu eeb eec eee eek een eeo eer ees eet eib eic eie eii eik ein eio eir eis eit eiu ekb ekc eke eki eko ekr eks ekt eku en- enb enc ene eni enk enn eno enr ens ent enu eo- eob eoc eoe eoi eok eon eoo eor eos eot eou erb erc ere eri erk ern ero err ers ert eru es- esb esc ese esi esk esn eso esr ess est esu etb etc ete eti etk etn eto etr ets ett etu eu- eub euc eue eui eun eur eus eut ibb ibc ibe ibi ibk ibn ibo ibr ibs ibt ibu icb icc ice ici ick icn ico icr ics ict icu ie- iec iee iei iek ien ier ies iet iib iic iie iii iin iio iir iis iit iiu ikb ikc ike iki ikk iko ikr iks ikt iku in- inb inc ine ini ink inn ino inr ins int inu io- iob ioc ioe ioi ion ioo ior ios iot iou ir- irb irc ire iri irk irn iro irr irs irt iru is- isb isc ise isi isk isn iso isr iss ist isu itb itc ite iti itk itn ito its itt itu iu- iub iuc iue iui iur ius iut k-t kbb kbc kbe kbi kbk kbn kbo kbr kbs kbu kcb kcc kce kci kck kcn kcr kcs kct kcu ke- keb kec kee kei kek ken keo ker kes ket kib kic kie kii kik kin kio kir kis kit kiu kkb kkc kke kki kkk kkn kkr kks kkt kku kn- knc kne kni knk knn kno knr knt knu kob koc koe koi kok kon koo kor kos kot kou krc kri krk krn kro krr krs krt kru ksb ksc kse ksi ksk ksn kso ksr kss kst ksu ktb ktc kte ktk ktn kto ktr kts ktt ktu kub kuc kue kui kuk kun kur kus kut kuu n-i nbb nbc nbe nbi nbk nbn nbo nbr nbs nbt nbu ncb ncc nce nci nck ncn nco ncr ncs nct ncu ne- neb nec nee nei nek nen neo ner nes net neu nib nic nie nii nik nin nio nir nis nit niu nkc nke nki nkk nkn nko nkr nks nkt nku nnb nnc nne nni nnk nnn nno nns nnt nnu no- nob noc noe noi nok non noo nor nos not nou nrb nrc nre nri nrk nrn nro nrr nrs nrt nru nsb nsc nse nsi nsk nsn nso nsr nss nst nsu ntb ntc nte nti ntk ntn nto ntr nts ntt ntu nub nuc nue nui nuk nun nuo nur nus nut nuu o-i ob- obb obc obe obi obk obn obo obr obs obt obu oc- ocb occ oci ock ocn oco ocr ocs oct ocu oeb oec oee oei oen oeo oer oes oet oib oic oie oii oik oin oio oir ois oit oiu okb okc oke oki okk oko okr oks oku on- onb onc one oni onk onn ono onr ons ont onu oo- oob ooc ooi ook oon ooo oor oos oot or- orb orc ore ori ork orn oro orr ors ort oru os- osb osc ose osi osk osn oso osr oss ost osu ot- otb otc ote oti otk otn oto otr ots ott otu ou- ouc oue oui ouk oun ouo our ous out rbb rbc rbe rbi rbk rbn rbo rbr rbs rbt rbu rcb rcc rce rci rcn rco rcr rcs rct rcu re- reb rec ree rei rek ren reo rer res ret reu rib ric rie rii rik rin rio rir ris rit rkb rkc rke rkk rko rks rkt rku rnb rnc rni rnn rno rnr rns rnt rnu rob roc roe roi rok ron roo ror ros rot rou rrb rrc rri rrk rrn rrr rrs rrt rru rsb rsc rse rsi rsk rsn rso rsr rss rst rsu rtb rtc rte rti rtk rtn rto rtr rts rtt rtu rub ruc rue rui ruk run ruo rur rus rut ruu sbb sbc sbe sbi sbk sbn sbo sbr sbs sbt sbu scb scc sce sci sck scn sco scr scs sct scu se- seb sec see sei sek sen seo ser ses set seu sib sic sie sii sik sin sio sir sis sit siu sk- skb skc ske ski skk sko