-er -ic a-a a-b a-c a-i aaa aab aac aae aai aak aar aau aav ab- aba abb abc abe abi abk abr abu abv ac- aca acb acc ace aci ack acr acu acv aea aeb aec aee aei aek aer aeu aev ai- aia aib aic aie aii aik air aiu aiv aka akb akc ake aki akk akr aku akv ar- ara arb arc are ari ark arr aru arv au- aua aub auc aue aui auk aur auv av- ava avb avc ave avi avk avr avu b-u baa bab bac bae bai bak bar bau bav bba bbb bbc bbe bbi bbk bbr bbu bca bcb bcc bce bci bck bcr bcu bcv be- bea beb bec bee bei bek ber beu bev bi- bia bib bic bie bii bik bir biu biv bka bkb bkc bke bkk bkr bkv bra brb bre bri brk brr bru brv bua bub buc bue bui buk bur buu bva bvb bvc bve bvi bvk bvr bvu bvv c-- caa cab cac cae cai cak car cau cav cba cbb cbc cbe cbi cbk cbr cbu cbv cca ccb ccc cce cci cck ccr ccu ccv ce- cea ceb cec cee cei cek cer ceu cev ci- cia cib cic cie cii cik cir ciu civ cka ckb ckc cki cra crb crc cre cri crk crr cru crv cua cub cuc cue cui cuk cur cuu cuv cva cvb cvc cve cvi cvk cvr cvu cvv eaa eab eac eae eai eak ear eau eav eba ebb ebc ebe ebi ebk ebr ebu ebv ec- eca ecb ecc ece eci eck ecr ecu ecv eea eeb eec eee eek eer eev eia eib eic eie eii eik eir eiu eiv eka ekb ekc eke eki ekr eku ekv era erb erc ere eri erk err eru erv eu- eua eub euc eue eui eur euv eva evb evc eve evi evr evv i-v ia- iaa iab iac iae iai iar iau iav iba ibb ibc ibe ibi ibk ibr ibu ibv ica icb icc ice ici ick icr icu icv ie- iea iec iee iei iek ier iev iia iib iic iie iii iir iiu ika ikb ikc ike iki ikk ikr iku ikv ir- ira irb irc ire iri irk irr iru irv iu- iua iub iuc iue iui iur iva ivb ivc ive ivi ivr ivu ivv ka- kaa kab kac kae kai kak kar kau kav kba kbb kbc kbe kbi kbk kbr kbu kca kcb kcc kce kci kck kcr kcu ke- kea keb kec kee kei kek ker kev kia kib kic kie kii kik kir kiu kiv kkb kkc kke kki kkk kkr kku kkv kra krc kri krk krr kru krv kub kuc kue kui kuk kur kuu kva kvb kvi kvk kvr kvv ra- raa rab rac rae rai rak rar rau rav rba rbb rbc rbe rbi rbk rbr rbu rca rcb rcc rce rci rcr rcu rcv re- rea reb rec ree rei rek rer reu rev ria rib ric rie rii rik rir riv rkb rkc rke rkk rku rkv rra rrb rrc rri rrk rrr rru rua rub ruc rue rui ruk rur ruu ruv rva rvb rvc rve rvi rvr rvu rvv ua- uaa uab uac uae uai uak uar uau uav uba ubb ubc ube ubi ubk ubr ubu ubv uca ucb ucc uce uci uck ucr ucu ucv uea ueb uec uee uei uer uia uib uic uie uii uir uiu uka ukb ukc uke uki ukk ukr uku ur- ura urb urc ure uri urk urr uru uua uuc uue uur uuu uva uvb uvc uve uvu uvv v-a v-e vaa vab vac vae vai vak var vau vav vba vbc vbi vbk vbr vbv vca vcc vce vci vcr vcu vea veb vec vee vei vek ver veu vi- via vib vic vie vii vik vir viu viv vka vkb vra vrb vrc vre vri vrk vrr vru vue vuk vur vuv vva vvb vvc vvi vvr vvv