-er -ic bbb bbc bbd bbe bbg bbi bbk bbo bbr bbs bbt bcb bcc bcd bce bcg bci bck bco bcr bcs bct bdb bdc bdd bde bdg bdi bdk bdo bdr bds bdt be- beb bec bed bee beg bei bek beo ber bes bet bgb bgc bgd bge bgg bgi bgk bgo bgr bgs bgt bi- bib bic bid bie big bii bik bio bir bis bit bkb bkc bke bkg bkk bko bkr bks bkt bob boc bod boe bog boi bok boo bor bos bot brb brd bre brg bri brk bro brr brs brt bsb bsc bsd bse bsg bsi bsk bso bsr bss bst btb btc btd bte btg bti btk bto btr bts btt c-- cbb cbc cbd cbe cbg cbi cbk cbo cbr cbs cbt ccb ccc ccd cce ccg cci cck cco ccr ccs cct cdb cdc cdd cde cdg cdi cdk cdo cdr cds cdt ce- ceb cec ced cee ceg cei cek ceo cer ces cet cgb cgc cgd cge cgg cgi cgo cgr cgs cgt ci- cib cic cid cie cig cii cik cio cir cis cit ckb ckc ckd cki cko cks ckt co- cob coc cod coe cog coi cok coo cor cos cot crb crc crd cre crg cri crk cro crr crs crt csb csc csd cse csg csi csk cso csr css cst ctb ctc ctd cte ctg cti ctk cto ctr cts ctt dbb dbc dbd dbe dbg dbi dbk dbo dbr dbs dbt dcb dcc dcd dce dcg dci dck dco dcr dcs dct ddb ddc ddd dde ddg ddi ddk ddo ddr dds ddt de- deb dec ded dee deg dei dek deo der des det dgc dgd dge dgg dgi dgk dgr dgs dgt di- dib dic did die dig dii dik dio dir dis dit dkb dkc dke dkg dki dkk dko dkr dks dkt dob doc dod doe dog doi dok doo dor dos dot drb drc drd dre drg dri drk dro drr drs drt dsb dsc dsd dse dsg dsi dsk dso dsr dss dst dtb dtc dtd dte dtg dti dtk dto dtr dts dtt ebb ebc ebd ebe ebg ebi ebk ebo ebr ebs ebt ec- ecb ecc ecd ece ecg eci eck eco ecr ecs ect ed- edb edc edd ede edg edi edk edo edr eds edt eeb eec eed eee eeg eek eeo eer ees eet egb egc egd ege egg egi ego egr egs egt eib eic eid eie eig eii eik eio eir eis eit ekb ekc ekd eke ekg eki eko ekr eks ekt eo- eob eoc eod eoe eog eoi eok eoo eor eos eot erb erc erd ere erg eri erk ero err ers ert es- esb esc esd ese esg esi esk eso esr ess est etb etc etd ete etg eti etk eto etr ets ett g-d gbc gbd gbe gbg gbi gbk gbo gbr gbs gbt gcb gcc gcd gce gcg gci gck gco gcr gcs gct gdb gdc gdd gde gdi gdk gdo gdr gds gdt ge- geb gec ged gee geg gei gek geo ger ges get ggb ggc ggd ggg ggi ggo ggr ggs ggt gib gic gid gie gig gii gik gio gir gis git gkb gkd gko gks gkt gob goc god goe gog goi gok goo gor gos got grb grc grd gre grg gri grk gro grr grs grt gsb gsc gsd gse gsg gsi gsk gso gsr gss gst gtb gtc gtd gte gtg gti gtk gto gtr gts gtt i-d ibb ibc ibd ibe ibg ibi ibk ibo ibr ibs ibt icb icc icd ice icg ici ick ico icr ics ict idb idc idd ide idg idi idk ido idr ids idt ie- iec ied iee ieg iei iek ier ies iet igb igc igd ige igg igi igk igo igr igs igt iib iic iid iie iii iio iir iis iit ikb ikc ike iki ikk iko ikr iks ikt io- iob ioc iod ioe iog ioi ioo ior ios iot ir- irb irc ird ire irg iri irk iro irr irs irt is- isb isc isd ise isg isi isk iso isr iss ist itb itc itd ite itg iti itk ito its itt k-t kbb kbc kbd kbe kbi kbk kbo kbr kbs kcb kcc kcd kce kcg kci kck kcr kcs kct kdb kdc kde kdg kdk kdo kdr kds kdt ke- keb kec ked kee keg kei kek keo ker kes ket kgb kgc kgd kgi kgo kgs kib kic kid kie kig kii kik kio kir kis kit kkb kkc kke kki kkk kkr kks kkt kob koc kod koe kog koi kok koo kor kos kot krc krd krg kri krk kro krr krs krt ksb ksc ksd kse ksg ksi ksk kso ksr kss kst ktb ktc kte ktg ktk kto ktr kts ktt o-i ob- obb obc obd obe obg obi obk obo obr obs obt oc- ocb occ ocd ocg oci ock oco ocr ocs oct odb odc odd ode odg odi odo odr ods odt oeb oec oed oee oeg oei oeo oer oes oet ogc ogd oge ogg ogi ogo ogs ogt oib oic oid oie oii oik oio oir ois oit okb okc okd oke okg oki okk oko okr oks oo- oob ooc ood oog ooi ook ooo oor oos oot or- orb orc ord ore org ori ork oro orr ors ort os- osb osc osd ose osg osi osk oso osr oss ost ot- otb otc otd ote otg oti otk oto otr ots ott rbb rbc rbd rbe rbg rbi rbk rbo rbr rbs rbt rcb rcc rcd rce rcg rci rco rcr rcs rct rdb rdc rdd rde rdg rdi rdo rdr rds rdt re- reb rec red ree reg rei rek reo rer res ret rgb rgc rgd rge rgg rgi rgk rgo rgr rgs rgt rib ric rid rie rig rii