-al a-a a-b a-c aaa aab aac aad aah aal aar ab- aba abb abc abd abh abl abr ac- aca acb acc acd ach acl acr ad- ada adb adc add adh adl adr aha ahb ahc ahd ahh ahl ahr al- ala alb alc ald alh all alr ar- ara arb arc ard arh arl arr baa bab bac bad bah bal bar bba bbb bbc bbd bbh bbl bbr bca bcb bcc bcd bch bcl bcr bda bdb bdc bdd bdh bdl bdr bha bhb bhc bhd bhh bhl bhr bla blb blc bld blh bll blr bra brb brd brh brl brr c-- caa cab cac cad cah cal car cba cbb cbc cbd cbh cbl cbr cca ccb ccc ccd cch ccl ccr cda cdb cdc cdd cdh cdl cdr ch- cha chb chc chd chh chl chr cl- cla clb clc cld clh cll clr cra crb crc crd crh crl crr daa dab dac dad dah dal dar dba dbb dbc dbd dbh dbl dbr dca dcb dcc dcd dcl dcr dda ddb ddc ddd ddh ddl ddr dh- dha dhb dhc dhd dhh dhl dhr dl- dla dlb dlc dld dlh dll dlr dra drb drc drd drl drr haa hab hac had hah hal har hba hbb hbc hbd hbh hbl hbr hca hcb hcc hcd hch hcl hcr hda hdb hdc hdd hdh hdl hdr hha hhb hhc hhd hhh hhl hhr hla hlb hlc hld hlh hll hlr hr- hra hrb hrc hrd hrh hrl hrr la- laa lab lac lad lah lal lar lba lbb lbc lbd lbh lbl lbr lca lcb lcc lcd lch lcl lcr lda ldb ldc ldd ldh ldl ldr lha lhb lhc lhd lhh lhr lla llb llc lld lll llr lra lrb lrc lrd lrh lrr ra- raa rab rac rad rah ral rar rba rbb rbc rbd rbh rbl rbr rca rcb rcc rcd rch rcl rcr rda rdb rdc rdd rdh rdl rdr rh- rha rhb rhc rhd rhh rhl rhr rla rlc rld rlh rll rlr rra rrb rrc rrd rrh rrl rrr