bbb bbd bbe bbi bdb bdd bde bdi bdz be- beb bed bee bei bez bi- bib bid bie bii biz bzd bze bzz dbb dbd dbe dbi dbz ddb ddd dde ddi ddz de- deb ded dee dei dez di- dib did die dii diz dzb dzd dze dzi ebb ebd ebe ebi ed- edb edd ede edi eeb eed eee eib eid eie eii eze ezz i-d ibb ibd ibe ibi ibz idb idd ide idi ie- ied iee iei iib iid iie iii ize izi izz zbb zeb zed zee zez zib zid zie ziz zzz