-er -ic bbb bbc bbe bbi bbk bbn bbo bbr bbs bbt bcb bcc bce bci bck bcn bco bcr bcs bct be- beb bec bee bei bek ben beo ber bes bet bi- bib bic bie bii bik bin bio bir bis bit bkb bkc bke bkk bkn bko bkr bks bkt bnb bnc bne bni bnk bnn bno bnr bns bnt bob boc boe boi bok bon boo bor bos bot brb bre bri brk brn bro brr brs brt bsb bsc bse bsi bsk bsn bso bsr bss bst btb btc bte bti btk btn bto btr bts btt c-- cbb cbc cbe cbi cbk cbn cbo cbr cbs cbt ccb ccc cce cci cck ccn cco ccr ccs cct ce- ceb cec cee cei cek cen ceo cer ces cet ci- cib cic cie cii cik cin cio cir cis cit ckb ckc cki cko cks ckt cn- cnb cnc cne cni cnn cno cnr cns cnt co- cob coc coe coi cok con coo cor cos cot crb crc cre cri crk crn cro crr crs crt csb csc cse csi csk csn cso csr css cst ctb ctc cte cti ctk ctn cto ctr cts ctt ebb ebc ebe ebi ebk ebn ebo ebr ebs ebt ec- ecb ecc ece eci eck ecn eco ecr ecs ect eeb eec eee eek een eeo eer ees eet eib eic eie eii eik ein eio eir eis eit ekb ekc eke eki eko ekr eks ekt en- enb enc ene eni enk enn eno enr ens ent eo- eob eoc eoe eoi eok eon eoo eor eos eot erb erc ere eri erk ern ero err ers ert es- esb esc ese esi esk esn eso esr ess est etb etc ete eti etk etn eto etr ets ett ibb ibc ibe ibi ibk ibn ibo ibr ibs ibt icb icc ice ici ick icn ico icr ics ict ie- iec iee iei iek ien ier ies iet iib iic iie iii iin iio iir iis iit ikb ikc ike iki ikk iko ikr iks ikt in- inb inc ine ini ink inn ino inr ins int io- iob ioc ioe ioi ion ioo ior ios iot ir- irb irc ire iri irk irn iro irr irs irt is- isb isc ise isi isk isn iso isr iss ist itb itc ite iti itk itn ito its itt k-t kbb kbc kbe kbi kbk kbn kbo kbr kbs kcb kcc kce kci kck kcn kcr kcs kct ke- keb kec kee kei kek ken keo ker kes ket kib kic kie kii kik kin kio kir kis kit kkb kkc kke kki kkk kkn kkr kks kkt kn- knc kne kni knk knn kno knr knt kob koc koe koi kok kon koo kor kos kot krc kri krk krn kro krr krs krt ksb ksc kse ksi ksk ksn kso ksr kss kst ktb ktc kte ktk ktn kto ktr kts ktt n-i nbb nbc nbe nbi nbk nbn nbo nbr nbs nbt ncb ncc nce nci nck ncn nco ncr ncs nct ne- neb nec nee nei nek nen neo ner nes net nib nic nie nii nik nin nio nir nis nit nkc nke nki nkk nkn nko nkr nks nkt nnb nnc nne nni nnk nnn nno nns nnt no- nob noc noe noi nok non noo nor nos not nrb nrc nre nri nrk nrn nro nrr nrs nrt nsb nsc nse nsi nsk nsn nso nsr nss nst ntb ntc nte nti ntk ntn nto ntr nts ntt o-i ob- obb obc obe obi obk obn obo obr obs obt oc- ocb occ oci ock ocn oco ocr ocs oct oeb oec oee oei oen oeo oer oes oet oib oic oie oii oik oin oio oir ois oit okb okc oke oki okk oko okr oks on- onb onc one oni onk onn ono onr ons ont oo- oob ooc ooi ook oon ooo oor oos oot or- orb orc ore ori ork orn oro orr ors ort os- osb osc ose osi osk osn oso osr oss ost ot- otb otc ote oti otk otn oto otr ots ott rbb rbc rbe rbi rbk rbn rbo rbr rbs rbt rcb rcc rce rci rcn rco rcr rcs rct re- reb rec ree rei rek ren reo rer res ret rib ric rie rii rik rin rio rir ris rit rkb rkc rke rkk rko rks rkt rnb rnc rni rnn rno rnr rns rnt rob roc roe roi rok ron roo ror ros rot rrb rrc rri rrk rrn rrr rrs rrt rsb rsc rse rsi rsk rsn rso rsr rss rst rtb rtc rte rti rtk rtn rto rtr rts rtt sbb sbc sbe sbi sbk sbn sbo sbr sbs sbt scb scc sce sci sck scn sco scr scs sct se- seb sec see sei sek sen seo ser ses set sib sic sie sii sik sin sio sir sis sit sk- skb skc ske ski skk sko skr sks skt snb snc sne sni snk snn sno snr sns snt sob soc soe soi sok son soo sor sos sot sr- srb src sre sri srk srn sro srr srs srt ss- ssb ssc sse ssi ssk ssn sso ssr sss sst stb stc ste sti stk stn sto str sts stt tbb tbc tbe tbi tbk tbn tbo tbr tbs tbt tcb tcc tce tci tck tcn tco tcr tcs tct te- teb tec tee tei tek ten teo ter tes tet tib tic tie tii tik tin tio tir tis tit tkb tkc tke tkk tko tkr tks tkt tnb tnc tne tni tnk tnn tno tnr tns tnt to- tob toc toe toi tok ton too tor tos tot trb trc tre tri trk trn tro trr trs trt tsb tsc tse tsi tsk tsn tso tsr tss tst ttb ttc tte tti ttk ttn tto ttr tts ttt