a-ya aaaa aaab aaac aaal aaba aabb aabc aabl aaby aaca aacb aacc aacl aacy aala aalc aall abaa abab abac abal abax abay abb- abba abbb abby abca abcb abcc abcl abla ably abyc abyy acaa acab acac acba acbl acca accc accy acla aclc acyl alaa alac alal alay alb- alba albc alby alca alcc all- alla alll ally alxa alya alyx axal axyl ayal ayay ayca ayla ayya ba-x baaa baal baba babb baby bac- baca bacc bala balc ball baly baya bayl bbay bbbb bblb bcaa bcbc bcca bccc bccl blaa blab blac blay bly- byla caaa caab caac caal caba caby cac- caca cacc cala calc call calx caxa caxy cbac cbal cbax cbbc cbca cbcc cbcl cblb cblc cbxa ccaa ccab ccac ccba ccbc ccca cccb cccc cccl ccla cclc cclx ccxl clab clay clxx cly- cxxx cya- cyaa cyba cybb cybc cyc- cyca cycb cycc cycl cyl- cylc cyll cyy- cyyc laaa laac laal laax laba laby laca lacc lacl lacy lala lall laxa laxy laya lbcc lcac lcbc lcca lccc llay llcc lllc llll lxxx lyc- lyla lyly lyx- xacl xala xall xcal xcbl xxxx xxxy xyl- yaba yacc yacy yala yall yaxa yaya ycab yccc ylay ylla yyyy