-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aan aao aap aar aat ab- aba abb abc abe abi abn abo abp abr abt ac- aca acb acc ace aci acn aco acp acr act aea aeb aec aee aei aen aeo aep aer aet ai- aia aib aic aie aii ain aio aip air ait an- ana anb anc ane ani ann ano anp anr ant aoa aob aoc aoe aoi aon aoo aop aor aot ap- apa apb apc ape api apn apo app apr apt ar- ara arb arc are ari arn aro arp arr art at- ata atb atc ate ati atn ato atp atr att b-p baa bab bac bae bai ban bao bap bar bat bba bbb bbc bbe bbi bbn bbo bbp bbr bbt bca bcb bcc bce bci bcn bco bcp bcr bct be- bea beb bec bee bei ben beo bep ber bet bi- bia bib bic bie bii bin bio bip bir bit bna bnb bnc bne bni bnn bno bnp bnr bnt boa bob boc boe boi bon boo bop bor bot bpa bpb bpc bpe bpi bpn bpo bpp bpr bpt bra brb bre bri brn bro brp brr brt bta btb btc bte bti btn bto btp btr btt c-- caa cab cac cae cai can cao cap car cat cba cbb cbc cbe cbi cbn cbo cbp cbr cbt cca ccb ccc cce cci ccn cco ccp ccr cct ce- cea ceb cec cee cei cen ceo cep cer cet ci- cia cib cic cie cii cin cio cip cir cit cn- cna cnb cnc cne cni cnn cno cnp cnr cnt co- coa cob coc coe coi con coo cop cor cot cpa cpb cpc cpe cpi cpn cpo cpp cpr cpt cra crb crc cre cri crn cro crp crr crt cta ctb ctc cte cti ctn cto ctp ctr ctt eaa eab eac eae eai ean eao eap ear eat eba ebb ebc ebe ebi ebn ebo ebp ebr ebt ec- eca ecb ecc ece eci ecn eco ecr ect eea eeb eec eee een eeo eep eer eet eia eib eic eie eii ein eio eip eir eit en- ena enb enc ene eni enn eno enp enr ent eo- eoa eob eoc eoe eoi eon eoo eop eor eot ep- epa epb epc epe epi epn epo epp epr ept era erb erc ere eri ern ero erp err ert eta etb etc ete eti etn eto etp etr ett ia- iaa iab iac iae iai ian iao iap iar iat iba ibb ibc ibe ibi ibn ibo ibp ibr ibt ica icb icc ice ici icn ico icp icr ict ie- iea iec iee iei ien iep ier iet iia iib iic iie iii iin iio iip iir iit in- ina inb inc ine ini inn ino inp inr int io- ioa iob ioc ioe ioi ion ioo iop ior iot ipa ipb ipc ipe ipi ipn ipo ipp ipr ipt ir- ira irb irc ire iri irn iro irp irr irt ita itb itc ite iti itn ito itp itt n-i naa nab nac nae nai nan nao nap nar nat nba nbb nbc nbe nbi nbn nbo nbp nbr nbt nca ncb ncc nce nci ncn nco ncp ncr nct ne- nea neb nec nee nei nen neo nep ner net nia nib nic nie nii nin nio nip nir nit nna nnb nnc nne nni nnn nno nnp nnt no- noa nob noc noe noi non noo nop nor not npa npb npc npe npi npn npo npp npr npt nra nrb nrc nre nri nrn nro nrp nrr nrt nta ntb ntc nte nti ntn nto ntp ntr ntt o-i oaa oab oac oae oai oan oao oap oar oat ob- oba obb obc obe obi obn obo obp obr obt oc- oca ocb occ oci ocn oco ocp ocr oct oea oeb oec oee oei oen oeo oep oer oet oia oib oic oie oii oin oio oip oir oit on- ona onb onc one oni onn ono onp onr ont oo- ooa oob ooc ooi oon ooo oop oor oot op- opa opb opc ope opi opn opo opp opr opt or- ora orb orc ore ori orn oro orp orr ort ot- ota otb otc ote oti otn oto otp otr ott p-p paa pab pac pae pai pan pao pap par pat pba pbb pbc pbe pbi pbn pbo pbp pbr pbt pca pcb pcc pce pci pcn pco pcp pcr pct pea peb pec pee pei pen peo pep per pet pia pib pic pie pii pin pio pip pir pit pn- pna pnb pnc pne pni pnn pno pnp pnr pnt poa pob poc poe poi pon poo pop por pot ppa ppb ppc ppe ppi ppn ppo ppp ppr ppt pra prb prc pre pri prn pro prp prr prt pt- pta ptb ptc pte pti ptn pto ptp ptr ptt ra- raa rab rac rae rai ran rao rap rar rat rba rbb rbc rbe rbi rbn rbo rbp rbr rbt rca rcb rcc rce rci rcn rco rcp rcr rct re- rea reb rec ree rei ren reo rep rer ret ria rib ric rie rii rin rio rip rir rit rna rnb rnc rni rnn rno rnp rnr rnt roa rob roc roe roi ron roo rop ror rot rpa rpb rpc rpe rpi rpn rpo rpp rpr rpt rra rrb rrc rri rrn rrp rrr rrt rta rtb rtc rte rti rtn rto rtp rtr rtt taa tab tac tae tai tan tao tap tar tat tba tbb tbc tbe tbi tbn tbo tbp tbr tbt tca tcb tcc tce tci tcn tco tcp tcr tct te- tea teb tec tee tei ten teo tep ter tet tia tib tic tie tii tin tio tip tir tit tna tnb tnc tne tni tnn tno tnp tnr tnt to- toa tob toc