a-a a-b a-c aaa aab aac aak aas aaw aay ab- aba abb abc abk abs abw aby ac- aca acb acc ack acs acw acy aka akb akc akk aks akw as- asa asb asc ask ass asw asy aw- awa awb awc awk aws aww awy ay- aya ayc ayk ays ayw baa bab bac bak bas baw bay bba bbb bbc bbk bbs bbw bby bca bcb bcc bck bcs bcy bka bkb bkc bkk bks bkw bsa bsb bsc bsk bss bsw bsy bwa bwb bwc bwk bws bwy by- bya byc byk bys c-- caa cab cac cak cas caw cay cba cbb cbc cbk cbs cbw cby cca ccb ccc cck ccs ccw cka ckb ckc cks ckw cky csa csb csc csk css csw csy cw- cwa cwb cwc cwk cws cya cyb cyc cyk cys cyw ka- kaa kab kac kak kas kaw kay kba kbb kbc kbk kbs kbw kca kcb kcc kck kcs kkb kkc kkk kks kky ksa ksb ksc ksk kss ksw kw- kwa kwc kwk kws kww kya kyc kys kyw saa sab sac sak sas saw say sba sbb sbc sbk sbs sbw sby sca scb scc sck scs scw sk- ska skb skc skk sks skw sky ss- ssa ssb ssc ssk sss ssw swa swb swc swk sws swy sy- sya syb syc syk sys waa wab wac wak was waw way wba wbb wbc wbs wbw wca wcb wcc wck wcs wcw wka wkb wkc wks wkw wky wsa wsb wsc wsk wss wsw wwa wwc www wy- wya wyc wyk wys yaa yab yac yak yas yaw yay ybc ybs yby yca ycc ycs ycw ycy yka ykk ysa ysb ysc ysk yss ysy ywc yyb yyc yys yyy