b-u bbb bbd bbe bbi bbl bbu bbx bdb bdd bde bdi bdl bdu bdx be- beb bed bee bei bel beu bex bi- bib bid bie bii bil biu bix blb bld ble bli bll blu blx bub bud bue bui bul buu bux bxb bxd bxi bxl bxx dbb dbd dbe dbi dbl dbu dbx ddb ddd dde ddi ddl ddu ddx de- deb ded dee dei del deu dex di- dib did die dii dil diu dix dl- dlb dld dle dli dll dlu dlx dub dud due dui dul dux dxd dxi dxl dxx ebb ebd ebe ebi ebl ebu ebx ed- edb edd ede edi edl edu edx eeb eed eee eel eex eib eid eie eii eil eiu eix elb eld ele eli ell elu elx eu- eub eud eue eui eul eux ex- exd exe exi exl exu exx i-d ibb ibd ibe ibi ibl ibu ibx idb idd ide idi idl idu idx ie- ied iee iei iel iex iib iid iie iii iil iiu iix il- ilb ild ile ili ill ilu ilx iu- iub iud iue iui ixe ixi ixl lbb lbd lbe lbi lbl lbu lbx ldb ldd lde ldi ldl ldu leb led lee lei lel leu lex lib lid lie lii lil liu lix llb lld lle lli lll llu lub lud lue lui lul luu lux lxd lxi lxx ubb ube ubi ubl ubu ubx udb udd ude udi udl udu udx ueb ued uee uei uel uib uid uie uii uil uiu ulb uld ule uli ull ulu uue uuu uxb uxu xbe xbl xbx xdb xde xdi xed xee xel xeu xex xie xii xiu xix xlb xld xli xue xui xul xxi xxl xxx