b-u bbb bbd bbe bbf bbi bbu bdb bdd bde bdf bdi bdu be- beb bed bee bef bei beu bfb bfd bfe bff bfi bfu bi- bib bid bie bif bii biu bub bud bue buf bui buu dbb dbd dbe dbf dbi dbu ddb ddd dde ddf ddi ddu de- deb ded dee def dei deu dfb dfd dfe dff dfi dfu di- dib did die dif dii diu dub dud due duf dui ebb ebd ebe ebf ebi ebu ed- edb edd ede edf edi edu eeb eed eee eef ef- efb efd efe eff efi eib eid eie eif eii eiu eu- eub eud eue euf eui fbb fbd fbe fbf fbi fbu fdb fdd fde fdf fdi fdu feb fed fee fef fei feu ffd ffe fff ffi ffu fib fid fie fif fii fiu fub fud fue fuf fui fuu i-d i-f ibb ibd ibe ibf ibi ibu idb idd ide idf idi idu ie- ied iee ief iei ifb ifd ife iff ifi ifu iib iid iie iif iii iiu iu- iub iud iue iui ubb ube ubf ubi ubu udb udd ude udf udi udu ueb ued uee uef uei ufd ufe uff ufi ufu uib uid uie uif uii uiu uue uuu