-al a-a a-b a-c aaa aab aac aad aae aaf aah aal ab- aba abb abc abd abe abf abh abl ac- aca acb acc acd ace acf ach acl ad- ada adb adc add ade adf adh adl aea aeb aec aed aee aef aeh ael af- afa afb afc afd afe aff afh afl aha ahb ahc ahd ahe ahf ahh ahl al- ala alb alc ald ale alf alh all baa bab bac bad bae baf bah bal bba bbb bbc bbd bbe bbf bbh bbl bca bcb bcc bcd bce bcf bch bcl bda bdb bdc bdd bde bdf bdh bdl be- bea beb bec bed bee bef beh bel bfa bfb bfc bfd bfe bff bfh bfl bha bhb bhc bhd bhe bhf bhh bhl bla blb blc bld ble blf blh bll c-- caa cab cac cad cae caf cah cal cba cbb cbc cbd cbe cbf cbh cbl cca ccb ccc ccd cce ccf cch ccl cda cdb cdc cdd cde cdf cdh cdl ce- cea ceb cec ced cee cef ceh cel cfa cfb cfc cfd cfe cff cfh cfl ch- cha chb chc chd che chf chh chl cl- cla clb clc cld cle clf clh cll daa dab dac dad dae daf dah dal dba dbb dbc dbd dbe dbf dbh dbl dca dcb dcc dcd dce dcf dcl dda ddb ddc ddd dde ddf ddh ddl de- dea deb dec ded dee def deh del dfa dfb dfc dfd dfe dff dfh dfl dh- dha dhb dhc dhd dhe dhf dhh dhl dl- dla dlb dlc dld dle dlf dlh dll eaa eab eac ead eae eaf eah eal eba ebb ebc ebd ebe ebf ebh ebl ec- eca ecb ecc ecd ece ecf ech ecl ed- eda edb edc edd ede edf edh edl eea eeb eec eed eee eef eel ef- efa efb efc efd efe eff efh efl eha ehb ehc ehd ehe ehf ehh ehl ela elb elc eld ele elf elh ell faa fab fac fad fae faf fah fal fba fbb fbc fbd fbe fbf fbh fbl fca fcb fcc fcd fce fcf fcl fda fdb fdc fdd fde fdf fdh fdl fea feb fec fed fee fef feh fel ffa ffc ffd ffe fff ffh ffl fha fhb fhc fhe fhf fhh fhl fla flb flc fld fle flf fll haa hab hac had hae haf hah hal hba hbb hbc hbd hbe hbf hbh hbl hca hcb hcc hcd hce hcf hch hcl hda hdb hdc hdd hde hdf hdh hdl he- hea heb hec hed hee hef heh hel hfa hfb hfc hfd hfe hff hfh hfl hha hhb hhc hhd hhe hhf hhh hhl hla hlb hlc hld hle hlf hlh hll la- laa lab lac lad lae laf lah lal lba lbb lbc lbd lbe lbf lbh lbl lca lcb lcc lcd lce lcf lch lcl lda ldb ldc ldd lde ldf ldh ldl lea leb lec led lee lef leh lel lfa lfb lfc lfd lfe lff lfh lfl lha lhb lhc lhd lhf lhh lla llb llc lld lle llf lll