a-a a-b a-c aaa aab aac aad aah aao aav aay ab- aba abb abc abd abh abo abv aby ac- aca acb acc acd ach aco acv acy ad- ada adb adc add adh ado adv ady aha ahb ahc ahd ahh aho ahv ahy aoa aob aoc aod aoh aoo aov av- ava avb avc avd avh avo avy ay- aya ayc ayd ayh ayo baa bab bac bad bah bao bav bay bba bbb bbc bbd bbh bbo bby bca bcb bcc bcd bch bco bcv bcy bda bdb bdc bdd bdh bdo bdv bdy bha bhb bhc bhd bhh bho bhv boa bob boc bod boh boo bov boy bva bvb bvc bvd bvh bvo bvv by- bya byc byd byh byo c-- caa cab cac cad cah cao cav cay cba cbb cbc cbd cbh cbo cbv cby cca ccb ccc ccd cch cco ccv cda cdb cdc cdd cdh cdo cdv cdy ch- cha chb chc chd chh cho chv chy co- coa cob coc cod coh coo cov coy cva cvb cvc cvd cvh cvo cvv cya cyb cyc cyd cyo daa dab dac dad dah dao dav day dba dbb dbc dbd dbh dbo dbv dby dca dcb dcc dcd dco dcv dda ddb ddc ddd ddh ddo ddy dh- dha dhb dhc dhd dhh dho doa dob doc dod doh doo dov doy dva dvb dvc dvd dvh dy- dya dyb dyc dyd dyo dyy haa hab hac had hah hao hav hay hba hbb hbc hbd hbh hbo hbv hby hca hcb hcc hcd hch hco hcv hcy hda hdb hdc hdd hdh hdo hdv hdy hha hhb hhc hhd hhh hho hhv hhy hoa hob hoc hod hoh hoo hov hoy hv- hva hvb hvc hvd hvo hvv hvy hy- hya hyb hyc hyd hyh hyo hyv hyy oaa oab oac oad oah oao oav ob- oba obb obc obd obh obo obv oby oc- oca ocb occ ocd och oco ocv oda odb odc odd odh odo odv oha ohc ohd ohh oho oo- ooa oob ooc ood ooh ooo oov ov- ova ovb ovc ovd ovh ovo ovv oya oyd oyo v-a vaa vab vac vad vah vao vav vay vba vbc vbd vbh vbo vbv vca vcc vcd vch vco vcy vdb vdc vdd vdh vdo vdv vh- vha vhb vhc vhd vho voa vob voc vod voh voo vov voy vva vvb vvc vvo vvv vyd yaa yab yac yad yah yao yav yay ybc yby yca ycc ycd ych yco ycv ycy yda ydo ydy yha yhc yob yoc yod yoo yoy yva yvo yvy yyb yyc yyy