-al a-a a-b a-c aaa aab aac aad aae aal aau aax ab- aba abb abc abd abe abl abu abx ac- aca acb acc acd ace acl acu acx ad- ada adb adc add ade adl adu adx aea aeb aec aed aee ael aeu aex al- ala alb alc ald ale all alu alx au- aua aub auc aud aue aul aux ax- axa axe axl axx b-u baa bab bac bad bae bal bau bax bba bbb bbc bbd bbe bbl bbu bbx bca bcb bcc bcd bce bcl bcu bcx bda bdb bdc bdd bde bdl bdu bdx be- bea beb bec bed bee bel beu bex bla blb blc bld ble bll blu blx bua bub buc bud bue bul buu bux bxb bxd bxl bxx c-- caa cab cac cad cae cal cau cax cba cbb cbc cbd cbe cbl cbu cbx cca ccb ccc ccd cce ccl ccu ccx cda cdb cdc cdd cde cdl cdu cdx ce- cea ceb cec ced cee cel ceu cex cl- cla clb clc cld cle cll clu clx cua cub cuc cud cue cul cuu cxc cxl cxx daa dab dac dad dae dal dau dax dba dbb dbc dbd dbe dbl dbu dbx dca dcb dcc dcd dce dcl dcu dcx dda ddb ddc ddd dde ddl ddu ddx de- dea deb dec ded dee del deu dex dl- dla dlb dlc dld dle dll dlu dlx dua dub duc dud due dul dux dxc dxd dxl dxx eaa eab eac ead eae eal eau eax eba ebb ebc ebd ebe ebl ebu ebx ec- eca ecb ecc ecd ece ecl ecu ecx ed- eda edb edc edd ede edl edu edx eea eeb eec eed eee eel eex ela elb elc eld ele ell elu elx eu- eua eub euc eud eue eul eux ex- exa exc exd exe exl exu exx la- laa lab lac lad lae lal lau lax lba lbb lbc lbd lbe lbl lbu lbx lca lcb lcc lcd lce lcl lcu lcx lda ldb ldc ldd lde ldl ldu lea leb lec led lee lel leu lex lla llb llc lld lle lll llu lua lub luc lud lue lul luu lux lxc lxd lxx ua- uaa uab uac uad uae ual uau uba ubb ubc ube ubl ubu ubx uca ucb ucc ucd uce ucl ucu uda udb udc udd ude udl udu udx uea ueb uec ued uee uel ula ulb ulc uld ule ull ulu uua uuc uue uuu uxb uxc uxu xaa xac xad xal xau xbc xbe xbl xbx xcb xcd xcl xcx xda xdb xdc xde xed xee xel xeu xex xla xlb xld xue xul xxl xxx