-al a-a a-b a-c aaa aab aac aad aah aal aan ab- aba abb abc abd abh abl abn ac- aca acb acc acd ach acl acn ad- ada adb adc add adh adl adn aha ahb ahc ahd ahh ahl ahn al- ala alb alc ald alh all aln an- ana anb anc and anh anl ann baa bab bac bad bah bal ban bba bbb bbc bbd bbh bbl bbn bca bcb bcc bcd bch bcl bcn bda bdb bdc bdd bdh bdl bha bhb bhc bhd bhh bhl bla blb blc bld blh bll bln bna bnb bnc bnd bnl bnn c-- caa cab cac cad cah cal can cba cbb cbc cbd cbh cbl cbn cca ccb ccc ccd cch ccl ccn cda cdb cdc cdd cdh cdl cdn ch- cha chb chc chd chh chl chn cl- cla clb clc cld clh cll cln cn- cna cnb cnc cnd cnh cnl cnn daa dab dac dad dah dal dan dba dbb dbc dbd dbh dbl dbn dca dcb dcc dcd dcl dcn dda ddb ddc ddd ddh ddl ddn dh- dha dhb dhc dhd dhh dhl dl- dla dlb dlc dld dlh dll dna dnb dnc dnd dnh dnl dnn haa hab hac had hah hal han hba hbb hbc hbd hbh hbl hbn hca hcb hcc hcd hch hcl hcn hda hdb hdc hdd hdh hdl hdn hha hhb hhc hhd hhh hhl hhn hla hlb hlc hld hlh hll hln hna hnb hnc hnd hnh hnl hnn la- laa lab lac lad lah lal lan lba lbb lbc lbd lbh lbl lca lcb lcc lcd lch lcl lcn lda ldb ldc ldd ldh ldl ldn lha lhb lhc lhd lhh lla llb llc lld lll lln lna lnb lnc lnd lnh lnl lnn naa nab nac nad nah nal nan nba nbb nbc nbd nbl nbn nca ncb ncc ncd nch ncl ncn nda ndb ndc ndd ndh ndl ndn nha nhb nhc nhd nhh nhl nhn nla nlb nlc nld nlh nll nln nna nnb nnc nnh nnl nnn