-er -ic a-a a-b a-c a-i aaa aab aac aad aae aai aak aar aau ab- aba abb abc abd abe abi abk abr abu ac- aca acb acc acd ace aci ack acr acu ad- ada adb adc add ade adi adk adr adu aea aeb aec aed aee aei aek aer aeu ai- aia aib aic aid aie aii aik air aiu aka akb akc akd ake aki akk akr aku ar- ara arb arc ard are ari ark arr aru au- aua aub auc aud aue aui auk aur b-u baa bab bac bad bae bai bak bar bau bba bbb bbc bbd bbe bbi bbk bbr bbu bca bcb bcc bcd bce bci bck bcr bcu bda bdb bdc bdd bde bdi bdk bdr bdu be- bea beb bec bed bee bei bek ber beu bi- bia bib bic bid bie bii bik bir biu bka bkb bkc bke bkk bkr bra brb brd bre bri brk brr bru bua bub buc bud bue bui buk bur buu c-- caa cab cac cad cae cai cak car cau cba cbb cbc cbd cbe cbi cbk cbr cbu cca ccb ccc ccd cce cci cck ccr ccu cda cdb cdc cdd cde cdi cdk cdr cdu ce- cea ceb cec ced cee cei cek cer ceu ci- cia cib cic cid cie cii cik cir ciu cka ckb ckc ckd cki cra crb crc crd cre cri crk crr cru cua cub cuc cud cue cui cuk cur cuu daa dab dac dad dae dai dak dar dau dba dbb dbc dbd dbe dbi dbk dbr dbu dca dcb dcc dcd dce dci dck dcr dcu dda ddb ddc ddd dde ddi ddk ddr ddu de- dea deb dec ded dee dei dek der deu di- dia dib dic did die dii dik dir diu dka dkb dkc dke dki dkk dkr dku dra drb drc drd dre dri drk drr dru dua dub duc dud due dui duk dur eaa eab eac ead eae eai eak ear eau eba ebb ebc ebd ebe ebi ebk ebr ebu ec- eca ecb ecc ecd ece eci eck ecr ecu ed- eda edb edc edd ede edi edk edr edu eea eeb eec eed eee eek eer eia eib eic eid eie eii eik eir eiu eka ekb ekc ekd eke eki ekr eku era erb erc erd ere eri erk err eru eu- eua eub euc eud eue eui eur i-d ia- iaa iab iac iad iae iai iar iau iba ibb ibc ibd ibe ibi ibk ibr ibu ica icb icc icd ice ici ick icr icu ida idb idc idd ide idi idk idr idu ie- iea iec ied iee iei iek ier iia iib iic iid iie iii iir iiu ika ikb ikc ike iki ikk ikr iku ir- ira irb irc ird ire iri irk irr iru iu- iua iub iuc iud iue iui iur ka- kaa kab kac kad kae kai kak kar kau kba kbb kbc kbd kbe kbi kbk kbr kbu kca kcb kcc kcd kce kci kck kcr kcu kda kdb kdc kde kdk kdr kdu ke- kea keb kec ked kee kei kek ker kia kib kic kid kie kii kik kir kiu kkb kkc kke kki kkk kkr kku kra krc krd kri krk krr kru kub kuc kud kue kui kuk kur kuu ra- raa rab rac rad rae rai rak rar rau rba rbb rbc rbd rbe rbi rbk rbr rbu rca rcb rcc rcd rce rci rcr rcu rda rdb rdc rdd rde rdi rdr rdu re- rea reb rec red ree rei rek rer reu ria rib ric rid rie rii rik rir rkb rkc rke rkk rku rra rrb rrc rrd rri rrk rrr rru rua rub ruc rud rue rui ruk rur ruu ua- uaa uab uac uad uae uai uak uar uau uba ubb ubc ube ubi ubk ubr ubu uca ucb ucc ucd uce uci uck ucr ucu uda udb udc udd ude udi udk udr udu uea ueb uec ued uee uei uer uia uib uic uid uie uii uir uiu uka ukb ukc uke uki ukk ukr uku ur- ura urb urc urd ure uri urk urr uru uua uuc uue uur uuu