-er -ic a-a a-b a-c a-i aaa aab aac aad aae aai aar aau aav ab- aba abb abc abd abe abi abr abu abv ac- aca acb acc acd ace aci acr acu acv ad- ada adb adc add ade adi adr adu adv aea aeb aec aed aee aei aer aeu aev ai- aia aib aic aid aie aii air aiu aiv ar- ara arb arc ard are ari arr aru arv au- aua aub auc aud aue aui aur auv av- ava avb avc avd ave avi avr avu b-u baa bab bac bad bae bai bar bau bav bba bbb bbc bbd bbe bbi bbr bbu bca bcb bcc bcd bce bci bcr bcu bcv bda bdb bdc bdd bde bdi bdr bdu bdv be- bea beb bec bed bee bei ber beu bev bi- bia bib bic bid bie bii bir biu biv bra brb brd bre bri brr bru brv bua bub buc bud bue bui bur buu bva bvb bvc bvd bve bvi bvr bvu bvv c-- caa cab cac cad cae cai car cau cav cba cbb cbc cbd cbe cbi cbr cbu cbv cca ccb ccc ccd cce cci ccr ccu ccv cda cdb cdc cdd cde cdi cdr cdu cdv ce- cea ceb cec ced cee cei cer ceu cev ci- cia cib cic cid cie cii cir ciu civ cra crb crc crd cre cri crr cru crv cua cub cuc cud cue cui cur cuu cuv cva cvb cvc cvd cve cvi cvr cvu cvv daa dab dac dad dae dai dar dau dav dba dbb dbc dbd dbe dbi dbr dbu dbv dca dcb dcc dcd dce dci dcr dcu dcv dda ddb ddc ddd dde ddi ddr ddu de- dea deb dec ded dee dei der deu dev di- dia dib dic did die dii dir diu div dra drb drc drd dre dri drr dru drv dua dub duc dud due dui dur duv dva dvb dvc dvd dve dvi dvr dvu eaa eab eac ead eae eai ear eau eav eba ebb ebc ebd ebe ebi ebr ebu ebv ec- eca ecb ecc ecd ece eci ecr ecu ecv ed- eda edb edc edd ede edi edr edu eea eeb eec eed eee eer eev eia eib eic eid eie eii eir eiu eiv era erb erc erd ere eri err eru erv eu- eua eub euc eud eue eui eur euv eva evb evc evd eve evi evr evv i-d i-v ia- iaa iab iac iad iae iai iar iau iav iba ibb ibc ibd ibe ibi ibr ibu ibv ica icb icc icd ice ici icr icu icv ida idb idc idd ide idi idr idu idv ie- iea iec ied iee iei ier iev iia iib iic iid iie iii iir iiu ir- ira irb irc ird ire iri irr iru irv iu- iua iub iuc iud iue iui iur iva ivb ivc ivd ive ivi ivr ivu ivv ra- raa rab rac rad rae rai rar rau rav rba rbb rbc rbd rbe rbi rbr rbu rca rcb rcc rcd rce rci rcr rcu rcv rda rdb rdc rdd rde rdi rdr rdu rdv re- rea reb rec red ree rei rer reu rev ria rib ric rid rie rii rir riv rra rrb rrc rrd rri rrr rru rua rub ruc rud rue rui rur ruu ruv rva rvb rvc rvd rve rvi rvr rvu rvv ua- uaa uab uac uad uae uai uar uau uav uba ubb ubc ube ubi ubr ubu ubv uca ucb ucc ucd uce uci ucr ucu ucv uda udb udc udd ude udi udr udu udv uea ueb uec ued uee uei uer uia uib uic uid uie uii uir uiu ur- ura urb urc urd ure uri urr uru uua uuc uue uur uuu uva uvb uvc uve uvu uvv v-a v-e vaa vab vac vad vae vai var vau vav vba vbc vbd vbi vbr vbv vca vcc vcd vce vci vcr vcu vdb vdc vdd vde vdi vdr vdu vdv vea veb vec ved vee vei ver veu vi- via vib vic vid vie vii vir viu viv vra vrb vrc vrd vre vri vrr vru vue vur vuv vva vvb vvc vvi vvr vvv