a-a a-b a-z aaa aab aad aap aar aay aaz ab- aba abb abd abp abr aby abz ad- ada adb add adp adr ady adz ap- apa apb apd app apr apy ar- ara arb ard arp arr ary arz ay- aya ayd ayp ayr ayz az- aza azb azd azp azy azz b-p baa bab bad bap bar bay baz bba bbb bbd bbp bbr bby bda bdb bdd bdp bdr bdy bdz bpa bpb bpd bpp bpr bpy bra brb brd brp brr bry brz by- bya byd byp byr byz bza bzd bzp bzr bzz daa dab dad dap dar day daz dba dbb dbd dbp dbr dby dbz dda ddb ddd ddp ddr ddy ddz dpa dpb dpd dpp dpr dpz dra drb drd drp drr dry drz dy- dya dyb dyd dyp dyr dyy dza dzb dzd dzp dzr p-p paa pab pad pap par pay paz pba pbb pbd pbp pbr pby pbz pda pdb pdd pdp pdr pdz ppa ppb ppd ppp ppr ppz pra prb prd prp prr pry prz py- pya pyb pyd pyr pzp ra- raa rab rad rap rar ray raz rba rbb rbd rbp rbr rda rdb rdd rdp rdr rdy rpa rpb rpd rpp rpr rpz rra rrb rrd rrp rrr ry- rya ryd ryr ryy ryz rza rzb rzy yaa yab yad yap yar yay yaz ybp ybr yby ybz yda ydy ypa ypd yra yrp yyb yyy yyz yzb yzr yzy zaa zab zad zap zar zay zaz zbb zbr zby zpp zpr zrp zzr zzy zzz