-er b-p bbb bbd bbe bbi bbk bbn bbo bbp bbr bbt bdb bdd bde bdi bdk bdo bdp bdr bdt be- beb bed bee bei bek ben beo bep ber bet bi- bib bid bie bii bik bin bio bip bir bit bkb bke bkk bkn bko bkp bkr bkt bnb bnd bne bni bnk bnn bno bnp bnr bnt bob bod boe boi bok bon boo bop bor bot bpb bpd bpe bpi bpn bpo bpp bpr bpt brb brd bre bri brk brn bro brp brr brt btb btd bte bti btk btn bto btp btr btt dbb dbd dbe dbi dbk dbn dbo dbp dbr dbt ddb ddd dde ddi ddk ddn ddo ddp ddr ddt de- deb ded dee dei dek den deo dep der det di- dib did die dii dik din dio dip dir dit dkb dke dki dkk dko dkp dkr dkt dnb dnd dne dni dnk dnn dno dnp dnr dnt dob dod doe doi dok don doo dop dor dot dpb dpd dpe dpi dpk dpn dpo dpp dpr dpt drb drd dre dri drk drn dro drp drr drt dtb dtd dte dti dtk dtn dto dtp dtr dtt ebb ebd ebe ebi ebk ebn ebo ebp ebr ebt ed- edb edd ede edi edk edn edo edp edr edt eeb eed eee eek een eeo eep eer eet eib eid eie eii eik ein eio eip eir eit ekb ekd eke eki eko ekp ekr ekt en- enb end ene eni enk enn eno enp enr ent eo- eob eod eoe eoi eok eon eoo eop eor eot ep- epb epd epe epi epn epo epp epr ept erb erd ere eri erk ern ero erp err ert etb etd ete eti etk etn eto etp etr ett i-d ibb ibd ibe ibi ibk ibn ibo ibp ibr ibt idb idd ide idi idk idn ido idp idr idt ie- ied iee iei iek ien iep ier iet iib iid iie iii iin iio iip iir iit ikb ike iki ikk iko ikr ikt in- inb ind ine ini ink inn ino inp inr int io- iob iod ioe ioi ion ioo iop ior iot ipb ipd ipe ipi ipn ipo ipp ipr ipt ir- irb ird ire iri irk irn iro irp irr irt itb itd ite iti itk itn ito itp itt k-t kbb kbd kbe kbi kbk kbn kbo kbp kbr kdb kde kdk kdo kdp kdr kdt ke- keb ked kee kei kek ken keo kep ker ket kib kid kie kii kik kin kio kip kir kit kkb kke kki kkk kkn kkp kkr kkt kn- knd kne kni knk knn kno knp knr knt kob kod koe koi kok kon koo kop kor kot kpd kpe kpi kpk kpn kpo kpp kpr kpt krd kri krk krn kro krp krr krt ktb kte ktk ktn kto ktp ktr ktt n-i nbb nbd nbe nbi nbk nbn nbo nbp nbr nbt ndb ndd nde ndi ndk ndn ndo ndp ndr ndt ne- neb ned nee nei nek nen neo nep ner net nib nid nie nii nik nin nio nip nir nit nke nki nkk nkn nko nkp nkr nkt nnb nne nni nnk nnn nno nnp nnt no- nob nod noe noi nok non noo nop nor not npb npd npe npi npn npo npp npr npt nrb nrd nre nri nrk nrn nro nrp nrr nrt ntb ntd nte nti ntk ntn nto ntp ntr ntt o-i ob- obb obd obe obi obk obn obo obp obr obt odb odd ode odi odn odo odp odr odt oeb oed oee oei oen oeo oep oer oet oib oid oie oii oik oin oio oip oir oit okb okd oke oki okk oko okp okr on- onb ond one oni onk onn ono onp onr ont oo- oob ood ooi ook oon ooo oop oor oot op- opb opd ope opi opk opn opo opp opr opt or- orb ord ore ori ork orn oro orp orr ort ot- otb otd ote oti otk otn oto otp otr ott p-p pbb pbd pbe pbi pbk pbn pbo pbp pbr pbt pdb pdd pde pdi pdk pdn pdo pdp pdr pdt peb ped pee pei pek pen peo pep per pet pib pid pie pii pik pin pio pip pir pit pkb pkd pke pki pkn pko pkp pkr pkt pn- pnb pnd pne pni pnk pnn pno pnp pnr pnt pob pod poe poi pok pon poo pop por pot ppb ppd ppe ppi ppk ppn ppo ppp ppr ppt prb prd pre pri prk prn pro prp prr prt pt- ptb ptd pte pti ptk ptn pto ptp ptr ptt rbb rbd rbe rbi rbk rbn rbo rbp rbr rbt rdb rdd rde rdi rdn rdo rdp rdr rdt re- reb red ree rei rek ren reo rep rer ret rib rid rie rii rik rin rio rip rir rit rkb rke rkk rko rkp rkt rnb rnd rni rnn rno rnp rnr rnt rob rod roe roi rok ron roo rop ror rot rpb rpd rpe rpi rpk rpn rpo rpp rpr rpt rrb rrd rri rrk rrn rrp rrr rrt rtb rtd rte rti rtk rtn rto rtp rtr rtt tbb tbd tbe tbi tbk tbn tbo tbp tbr tbt tdb tdd tde tdi tdk tdn tdo tdp tdr tdt te- teb ted tee tei tek ten teo tep ter tet tib tid tie tii tik tin tio tip tir tit tkb tke tkk tko tkp tkr tkt tnb tnd tne tni tnk tnn tno tnp tnr tnt to- tob tod toe toi tok ton too top tor tot tpb tpd tpe tpi tpk tpn tpo tpp tpr tpt trb trd tre tri trk trn tro trp trr trt ttb ttd tte tti ttk ttn tto ttp ttr ttt