a-a a-b a-c aaa aab aac aad aah aao aaw ab- aba abb abc abd abh abo abw ac- aca acb acc acd ach aco acw ad- ada adb adc add adh ado adw aha ahb ahc ahd ahh aho ahw aoa aob aoc aod aoh aoo aow aw- awa awb awc awd awh awo aww baa bab bac bad bah bao baw bba bbb bbc bbd bbh bbo bbw bca bcb bcc bcd bch bco bda bdb bdc bdd bdh bdo bdw bha bhb bhc bhd bhh bho bhw boa bob boc bod boh boo bow bwa bwb bwc bwd bwh bwo c-- caa cab cac cad cah cao caw cba cbb cbc cbd cbh cbo cbw cca ccb ccc ccd cch cco ccw cda cdb cdc cdd cdh cdo cdw ch- cha chb chc chd chh cho chw co- coa cob coc cod coh coo cow cw- cwa cwb cwc cwd cwh cwo daa dab dac dad dah dao daw dba dbb dbc dbd dbh dbo dca dcb dcc dcd dco dcw dda ddb ddc ddd ddh ddo ddw dh- dha dhb dhc dhd dhh dho dhw doa dob doc dod doh doo dow dwa dwb dwc dwh dwo dww haa hab hac had hah hao haw hba hbb hbc hbd hbh hbo hbw hca hcb hcc hcd hch hco hcw hda hdb hdc hdd hdh hdo hdw hha hhb hhc hhd hhh hho hhw hoa hob hoc hod hoh hoo how hw- hwa hwb hwd hwo hww oaa oab oac oad oah oao oaw ob- oba obb obc obd obh obo obw oc- oca ocb occ ocd och oco ocw oda odb odc odd odh odo oha ohc ohd ohh oho oo- ooa oob ooc ood ooh ooo oow owa owb owc owd owh owo oww waa wab wac wad wah wao waw wba wbb wbc wbd wbo wbw wca wcb wcc wcd wch wco wcw wda wdb wdc wh- wha whb whc whd whh who whw woa wob woc wod woh woo wow wwa wwc wwd wwo www