-er -ic bbb bbc bbe bbh bbi bbk bbn bbo bbr bcb bcc bce bch bci bck bcn bco bcr be- beb bec bee beh bei bek ben beo ber bhb bhc bhe bhh bhi bhk bho bhr bi- bib bic bie bih bii bik bin bio bir bkb bkc bke bkk bkn bko bkr bnb bnc bne bni bnk bnn bno bnr bob boc boe boh boi bok bon boo bor brb bre brh bri brk brn bro brr c-- cbb cbc cbe cbh cbi cbk cbn cbo cbr ccb ccc cce cch cci cck ccn cco ccr ce- ceb cec cee ceh cei cek cen ceo cer ch- chb chc che chh chi chk chn cho chr ci- cib cic cie cih cii cik cin cio cir ckb ckc ckh cki cko cn- cnb cnc cne cnh cni cnn cno cnr co- cob coc coe coh coi cok con coo cor crb crc cre crh cri crk crn cro crr ebb ebc ebe ebh ebi ebk ebn ebo ebr ec- ecb ecc ece ech eci eck ecn eco ecr eeb eec eee eek een eeo eer ehb ehc ehe ehh ehi ehn eho ehr eib eic eie eii eik ein eio eir ekb ekc eke ekh eki eko ekr en- enb enc ene enh eni enk enn eno enr eo- eob eoc eoe eoh eoi eok eon eoo eor erb erc ere erh eri erk ern ero err h-i hbb hbc hbe hbh hbi hbk hbn hbo hbr hcb hcc hce hch hci hck hcn hco hcr he- heb hec hee heh hei hek hen heo her hhb hhc hhe hhh hhi hhk hhn hho hhr hib hic hie hih hii hik hin hio hir hkb hkh hki hkk hkn hko hkr hnb hnc hne hnh hnk hnn hno hob hoc hoe hoh hoi hok hon hoo hor hr- hrb hrc hre hrh hri hrk hrn hro hrr ibb ibc ibe ibh ibi ibk ibn ibo ibr icb icc ice ich ici ick icn ico icr ie- iec iee iei iek ien ier ihb ihc ihe ihh ihi ihk ihn iho ihr iib iic iie iih iii iin iio iir ikb ikc ike iki ikk iko ikr in- inb inc ine inh ini ink inn ino inr io- iob ioc ioe ioh ioi ion ioo ior ir- irb irc ire iri irk irn iro irr kbb kbc kbe kbh kbi kbk kbn kbo kbr kcb kcc kce kch kci kck kcn kcr ke- keb kec kee keh kei kek ken keo ker khe khh khi khk khn kho khr kib kic kie kih kii kik kin kio kir kkb kkc kke kkh kki kkk kkn kkr kn- knc kne kni knk knn kno knr kob koc koe koh koi kok kon koo kor krc kri krk krn kro krr n-i nbb nbc nbe nbi nbk nbn nbo nbr ncb ncc nce nch nci nck ncn nco ncr ne- neb nec nee neh nei nek nen neo ner nhb nhc nhe nhh nhi nhk nhn nhr nib nic nie nih nii nik nin nio nir nkc nke nki nkk nkn nko nkr nnb nnc nne nnh nni nnk nnn nno no- nob noc noe noh noi nok non noo nor nrb nrc nre nri nrk nrn nro nrr o-i ob- obb obc obe obh obi obk obn obo obr oc- ocb occ och oci ock ocn oco ocr oeb oec oee oeh oei oen oeo oer ohc ohe ohh ohi ohn oho ohr oib oic oie oii oik oin oio oir okb okc oke oki okk oko okr on- onb onc one onh oni onk onn ono onr oo- oob ooc ooh ooi ook oon ooo oor or- orb orc ore orh ori ork orn oro orr rbb rbc rbe rbh rbi rbk rbn rbo rbr rcb rcc rce rch rci rcn rco rcr re- reb rec ree reh rei rek ren reo rer rh- rhb rhc rhe rhh rhi rhn rho rhr rib ric rie rih rii rik rin rio rir rkb rkc rke rkk rko rnb rnc rnh rni rnn rno rnr rob roc roe roh roi rok ron roo ror rrb rrc rrh rri rrk rrn rrr