-er -ic bbb bbc bbe bbg bbh bbi bbk bbo bbr bcb bcc bce bcg bch bci bck bco bcr be- beb bec bee beg beh bei bek beo ber bgb bgc bge bgg bgh bgi bgk bgo bgr bhb bhc bhe bhg bhh bhi bhk bho bhr bi- bib bic bie big bih bii bik bio bir bkb bkc bke bkg bkk bko bkr bob boc boe bog boh boi bok boo bor brb bre brg brh bri brk bro brr c-- cbb cbc cbe cbg cbh cbi cbk cbo cbr ccb ccc cce ccg cch cci cck cco ccr ce- ceb cec cee ceg ceh cei cek ceo cer cgb cgc cge cgg cgh cgi cgo cgr ch- chb chc che chg chh chi chk cho chr ci- cib cic cie cig cih cii cik cio cir ckb ckc ckh cki cko co- cob coc coe cog coh coi cok coo cor crb crc cre crg crh cri crk cro crr ebb ebc ebe ebg ebh ebi ebk ebo ebr ec- ecb ecc ece ecg ech eci eck eco ecr eeb eec eee eeg eek eeo eer egb egc ege egg egh egi ego egr ehb ehc ehe ehg ehh ehi eho ehr eib eic eie eig eii eik eio eir ekb ekc eke ekg ekh eki eko ekr eo- eob eoc eoe eog eoh eoi eok eoo eor erb erc ere erg erh eri erk ero err gbc gbe gbg gbh gbi gbk gbo gbr gcb gcc gce gcg gch gci gck gco gcr ge- geb gec gee geg geh gei gek geo ger ggb ggc ggg ggh ggi ggo ggr ghb ghc ghe ghg ghh ghi gho ghr gib gic gie gig gih gii gik gio gir gkb gkh gko gob goc goe gog goh goi gok goo gor grb grc gre grg grh gri grk gro grr h-i hbb hbc hbe hbg hbh hbi hbk hbo hbr hcb hcc hce hcg hch hci hck hco hcr he- heb hec hee heg heh hei hek heo her hgb hgc hge hgg hgh hgi hgk hgo hgr hhb hhc hhe hhg hhh hhi hhk hho hhr hib hic hie hig hih hii hik hio hir hkb hkg hkh hki hkk hko hkr hob hoc hoe hog hoh hoi hok hoo hor hr- hrb hrc hre hrg hrh hri hrk hro hrr ibb ibc ibe ibg ibh ibi ibk ibo ibr icb icc ice icg ich ici ick ico icr ie- iec iee ieg iei iek ier igb igc ige igg igh igi igk igo igr ihb ihc ihe ihg ihh ihi ihk iho ihr iib iic iie iih iii iio iir ikb ikc ike iki ikk iko ikr io- iob ioc ioe iog ioh ioi ioo ior ir- irb irc ire irg iri irk iro irr kbb kbc kbe kbh kbi kbk kbo kbr kcb kcc kce kcg kch kci kck kcr ke- keb kec kee keg keh kei kek keo ker kgb kgc kgh kgi kgo khe khh khi khk kho khr kib kic kie kig kih kii kik kio kir kkb kkc kke kkh kki kkk kkr kob koc koe kog koh koi kok koo kor krc krg kri krk kro krr o-i ob- obb obc obe obg obh obi obk obo obr oc- ocb occ ocg och oci ock oco ocr oeb oec oee oeg oeh oei oeo oer ogc oge ogg ogh ogi ogo ohc ohe ohg ohh ohi oho ohr oib oic oie oii oik oio oir okb okc oke okg oki okk oko okr oo- oob ooc oog ooh ooi ook ooo oor or- orb orc ore org orh ori ork oro orr rbb rbc rbe rbg rbh rbi rbk rbo rbr rcb rcc rce rcg rch rci rco rcr re- reb rec ree reg reh rei rek reo rer rgb rgc rge rgg rgh rgi rgk rgo rgr rh- rhb rhc rhe rhg rhh rhi rho rhr rib ric rie rig rih rii rik rio rir rkb rkc rke rkg rkk rko rob roc roe rog roh roi rok roo ror rrb rrc rrg rrh rri rrk rrr