-al a-a a-b a-c aaa aab aac aad aae aah aal aau ab- aba abb abc abd abe abh abl abu ac- aca acb acc acd ace ach acl acu ad- ada adb adc add ade adh adl adu aea aeb aec aed aee aeh ael aeu aha ahb ahc ahd ahe ahh ahl ahu al- ala alb alc ald ale alh all alu au- aua aub auc aud aue auh aul b-u baa bab bac bad bae bah bal bau bba bbb bbc bbd bbe bbh bbl bbu bca bcb bcc bcd bce bch bcl bcu bda bdb bdc bdd bde bdh bdl bdu be- bea beb bec bed bee beh bel beu bha bhb bhc bhd bhe bhh bhl bhu bla blb blc bld ble blh bll blu bua bub buc bud bue buh bul buu c-- caa cab cac cad cae cah cal cau cba cbb cbc cbd cbe cbh cbl cbu cca ccb ccc ccd cce cch ccl ccu cda cdb cdc cdd cde cdh cdl cdu ce- cea ceb cec ced cee ceh cel ceu ch- cha chb chc chd che chh chl chu cl- cla clb clc cld cle clh cll clu cua cub cuc cud cue cuh cul cuu daa dab dac dad dae dah dal dau dba dbb dbc dbd dbe dbh dbl dbu dca dcb dcc dcd dce dcl dcu dda ddb ddc ddd dde ddh ddl ddu de- dea deb dec ded dee deh del deu dh- dha dhb dhc dhd dhe dhh dhl dhu dl- dla dlb dlc dld dle dlh dll dlu dua dub duc dud due duh dul eaa eab eac ead eae eah eal eau eba ebb ebc ebd ebe ebh ebl ebu ec- eca ecb ecc ecd ece ech ecl ecu ed- eda edb edc edd ede edh edl edu eea eeb eec eed eee eel eha ehb ehc ehd ehe ehh ehl ehu ela elb elc eld ele elh ell elu eu- eua eub euc eud eue eul haa hab hac had hae hah hal hau hba hbb hbc hbd hbe hbh hbl hbu hca hcb hcc hcd hce hch hcl hda hdb hdc hdd hde hdh hdl hdu he- hea heb hec hed hee heh hel heu hha hhb hhc hhd hhe hhh hhl hhu hla hlb hlc hld hle hlh hll hlu hua hub huc hud hue huh hul huu la- laa lab lac lad lae lah lal lau lba lbb lbc lbd lbe lbh lbl lbu lca lcb lcc lcd lce lch lcl lcu lda ldb ldc ldd lde ldh ldl ldu lea leb lec led lee leh lel leu lha lhb lhc lhd lhh lhu lla llb llc lld lle lll llu lua lub luc lud lue luh lul luu ua- uaa uab uac uad uae uah ual uau uba ubb ubc ube ubh ubl ubu uca ucb ucc ucd uce uch ucl ucu uda udb udc udd ude udl udu uea ueb uec ued uee ueh uel uha uhb uhc uhd uhe uhh uhl uhu ula ulb ulc uld ule ull ulu uua uuc uue uuu