-er -ic bbb bbc bbd bbe bbi bbk bbn bbo bbr bcb bcc bcd bce bci bck bcn bco bcr bdb bdc bdd bde bdi bdk bdo bdr be- beb bec bed bee bei bek ben beo ber bi- bib bic bid bie bii bik bin bio bir bkb bkc bke bkk bkn bko bkr bnb bnc bnd bne bni bnk bnn bno bnr bob boc bod boe boi bok bon boo bor brb brd bre bri brk brn bro brr c-- cbb cbc cbd cbe cbi cbk cbn cbo cbr ccb ccc ccd cce cci cck ccn cco ccr cdb cdc cdd cde cdi cdk cdn cdo cdr ce- ceb cec ced cee cei cek cen ceo cer ci- cib cic cid cie cii cik cin cio cir ckb ckc ckd cki cko cn- cnb cnc cnd cne cni cnn cno cnr co- cob coc cod coe coi cok con coo cor crb crc crd cre cri crk crn cro crr dbb dbc dbd dbe dbi dbk dbn dbo dbr dcb dcc dcd dce dci dck dcn dco dcr ddb ddc ddd dde ddi ddk ddn ddo ddr de- deb dec ded dee dei dek den deo der di- dib dic did die dii dik din dio dir dkb dkc dke dki dkk dko dkr dnb dnc dnd dne dni dnk dnn dno dnr dob doc dod doe doi dok don doo dor drb drc drd dre dri drk drn dro drr ebb ebc ebd ebe ebi ebk ebn ebo ebr ec- ecb ecc ecd ece eci eck ecn eco ecr ed- edb edc edd ede edi edk edn edo edr eeb eec eed eee eek een eeo eer eib eic eid eie eii eik ein eio eir ekb ekc ekd eke eki eko ekr en- enb enc end ene eni enk enn eno enr eo- eob eoc eod eoe eoi eok eon eoo eor erb erc erd ere eri erk ern ero err i-d ibb ibc ibd ibe ibi ibk ibn ibo ibr icb icc icd ice ici ick icn ico icr idb idc idd ide idi idk idn ido idr ie- iec ied iee iei iek ien ier iib iic iid iie iii iin iio iir ikb ikc ike iki ikk iko ikr in- inb inc ind ine ini ink inn ino inr io- iob ioc iod ioe ioi ion ioo ior ir- irb irc ird ire iri irk irn iro irr kbb kbc kbd kbe kbi kbk kbn kbo kbr kcb kcc kcd kce kci kck kcn kcr kdb kdc kde kdk kdo kdr ke- keb kec ked kee kei kek ken keo ker kib kic kid kie kii kik kin kio kir kkb kkc kke kki kkk kkn kkr kn- knc knd kne kni knk knn kno knr kob koc kod koe koi kok kon koo kor krc krd kri krk krn kro krr n-i nbb nbc nbd nbe nbi nbk nbn nbo nbr ncb ncc ncd nce nci nck ncn nco ncr ndb ndc ndd nde ndi ndk ndn ndo ndr ne- neb nec ned nee nei nek nen neo ner nib nic nid nie nii nik nin nio nir nkc nke nki nkk nkn nko nkr nnb nnc nne nni nnk nnn nno no- nob noc nod noe noi nok non noo nor nrb nrc nrd nre nri nrk nrn nro nrr o-i ob- obb obc obd obe obi obk obn obo obr oc- ocb occ ocd oci ock ocn oco ocr odb odc odd ode odi odn odo odr oeb oec oed oee oei oen oeo oer oib oic oid oie oii oik oin oio oir okb okc okd oke oki okk oko okr on- onb onc ond one oni onk onn ono onr oo- oob ooc ood ooi ook oon ooo oor or- orb orc ord ore ori ork orn oro orr rbb rbc rbd rbe rbi rbk rbn rbo rbr rcb rcc rcd rce rci rcn rco rcr rdb rdc rdd rde rdi rdn rdo rdr re- reb rec red ree rei rek ren reo rer rib ric rid rie rii rik rin rio rir rkb rkc rke rkk rko rnb rnc rnd rni rnn rno rnr rob roc rod roe roi rok ron roo ror rrb rrc rrd rri rrk rrn rrr