-er -ic a-a a-b a-c a-i aaa aab aac aae aai aan aao aar aau ab- aba abb abc abe abi abn abo abr abu ac- aca acb acc ace aci acn aco acr acu aea aeb aec aee aei aen aeo aer aeu ai- aia aib aic aie aii ain aio air aiu an- ana anb anc ane ani ann ano anr anu aoa aob aoc aoe aoi aon aoo aor aou ar- ara arb arc are ari arn aro arr aru au- aua aub auc aue aui aun auo aur b-u baa bab bac bae bai ban bao bar bau bba bbb bbc bbe bbi bbn bbo bbr bbu bca bcb bcc bce bci bcn bco bcr bcu be- bea beb bec bee bei ben beo ber beu bi- bia bib bic bie bii bin bio bir biu bna bnb bnc bne bni bnn bno bnr bnu boa bob boc boe boi bon boo bor bou bra brb bre bri brn bro brr bru bua bub buc bue bui bun buo bur buu c-- caa cab cac cae cai can cao car cau cba cbb cbc cbe cbi cbn cbo cbr cbu cca ccb ccc cce cci ccn cco ccr ccu ce- cea ceb cec cee cei cen ceo cer ceu ci- cia cib cic cie cii cin cio cir ciu cn- cna cnb cnc cne cni cnn cno cnr cnu co- coa cob coc coe coi con coo cor cou cra crb crc cre cri crn cro crr cru cua cub cuc cue cui cun cuo cur cuu eaa eab eac eae eai ean eao ear eau eba ebb ebc ebe ebi ebn ebo ebr ebu ec- eca ecb ecc ece eci ecn eco ecr ecu eea eeb eec eee een eeo eer eia eib eic eie eii ein eio eir eiu en- ena enb enc ene eni enn eno enr enu eo- eoa eob eoc eoe eoi eon eoo eor eou era erb erc ere eri ern ero err eru eu- eua eub euc eue eui eun eur ia- iaa iab iac iae iai ian iao iar iau iba ibb ibc ibe ibi ibn ibo ibr ibu ica icb icc ice ici icn ico icr icu ie- iea iec iee iei ien ier iia iib iic iie iii iin iio iir iiu in- ina inb inc ine ini inn ino inr inu io- ioa iob ioc ioe ioi ion ioo ior iou ir- ira irb irc ire iri irn iro irr iru iu- iua iub iuc iue iui iur n-i naa nab nac nae nai nan nao nar nau nba nbb nbc nbe nbi nbn nbo nbr nbu nca ncb ncc nce nci ncn nco ncr ncu ne- nea neb nec nee nei nen neo ner neu nia nib nic nie nii nin nio nir niu nna nnb nnc nne nni nnn nno nnu no- noa nob noc noe noi non noo nor nou nra nrb nrc nre nri nrn nro nrr nru nua nub nuc nue nui nun nuo nur nuu o-i oaa oab oac oae oai oan oao oar oau ob- oba obb obc obe obi obn obo obr obu oc- oca ocb occ oci ocn oco ocr ocu oea oeb oec oee oei oen oeo oer oia oib oic oie oii oin oio oir oiu on- ona onb onc one oni onn ono onr onu oo- ooa oob ooc ooi oon ooo oor or- ora orb orc ore ori orn oro orr oru ou- oua ouc oue oui oun ouo our ra- raa rab rac rae rai ran rao rar rau rba rbb rbc rbe rbi rbn rbo rbr rbu rca rcb rcc rce rci rcn rco rcr rcu re- rea reb rec ree rei ren reo rer reu ria rib ric rie rii rin rio rir rna rnb rnc rni rnn rno rnr rnu roa rob roc roe roi ron roo ror rou rra rrb rrc rri rrn rrr rru rua rub ruc rue rui run ruo rur ruu ua- uaa uab uac uae uai uan uao uar uau uba ubb ubc ube ubi ubn ubo ubr ubu uca ucb ucc uce uci ucn uco ucr ucu uea ueb uec uee uei uen uer uia uib uic uie uii uin uio uir uiu un- una unb unc une uni unn uno unr unu uoa uob uoc uoe uon uoo uor ur- ura urb urc ure uri urn uro urr uru uua uuc uue uun uur uuu