a-a a-b a-c aaa aab aac aad aao aar aau aaw ab- aba abb abc abd abo abr abu abw ac- aca acb acc acd aco acr acu acw ad- ada adb adc add ado adr adu adw aoa aob aoc aod aoo aor aou aow ar- ara arb arc ard aro arr aru arw au- aua aub auc aud auo aur auw aw- awa awb awc awd awo awr awu aww b-u baa bab bac bad bao bar bau baw bba bbb bbc bbd bbo bbr bbu bbw bca bcb bcc bcd bco bcr bcu bda bdb bdc bdd bdo bdr bdu bdw boa bob boc bod boo bor bou bow bra brb brd bro brr bru brw bua bub buc bud buo bur buu buw bwa bwb bwc bwd bwo bwr bwu c-- caa cab cac cad cao car cau caw cba cbb cbc cbd cbo cbr cbu cbw cca ccb ccc ccd cco ccr ccu ccw cda cdb cdc cdd cdo cdr cdu cdw co- coa cob coc cod coo cor cou cow cra crb crc crd cro crr cru crw cua cub cuc cud cuo cur cuu cuw cw- cwa cwb cwc cwd cwo cwr cwu daa dab dac dad dao dar dau daw dba dbb dbc dbd dbo dbr dbu dca dcb dcc dcd dco dcr dcu dcw dda ddb ddc ddd ddo ddr ddu ddw doa dob doc dod doo dor dou dow dra drb drc drd dro drr dru drw dua dub duc dud duo dur dwa dwb dwc dwo dwr dwu dww oaa oab oac oad oao oar oau oaw ob- oba obb obc obd obo obr obu obw oc- oca ocb occ ocd oco ocr ocu ocw oda odb odc odd odo odr odu oo- ooa oob ooc ood ooo oor oow or- ora orb orc ord oro orr oru ou- oua ouc oud ouo our owa owb owc owd owo owu oww ra- raa rab rac rad rao rar rau raw rba rbb rbc rbd rbo rbr rbu rbw rca rcb rcc rcd rco rcr rcu rcw rda rdb rdc rdd rdo rdr rdu roa rob roc rod roo ror rou row rra rrb rrc rrd rrr rru rua rub ruc rud ruo rur ruu rwa rwb rwc rwd rwr rwu ua- uaa uab uac uad uao uar uau uaw uba ubb ubc ubo ubr ubu ubw uca ucb ucc ucd uco ucr ucu ucw uda udb udc udd udo udr udu uoa uob uoc uod uoo uor uow ur- ura urb urc urd uro urr uru urw uua uuc uur uuu uwa uwb uwc uwr uww waa wab wac wad wao war wau waw wba wbb wbc wbd wbo wbr wbw wca wcb wcc wcd wco wcr wcu wcw wda wdb wdc wdr wdu woa wob woc wod woo wor wou wow wr- wra wrc wrd wro wrr wru wrw wua wub wuc wud wuo wur wwa wwc wwd wwo wwu www