bbb bbd bbe bbf bbi bdb bdd bde bdf bdi be- beb bed bee bef bei bfb bfd bfe bff bfi bi- bib bid bie bif bii dbb dbd dbe dbf dbi ddb ddd dde ddf ddi de- deb ded dee def dei dfb dfd dfe dff dfi di- dib did die dif dii ebb ebd ebe ebf ebi ed- edb edd ede edf edi eeb eed eee eef ef- efb efd efe eff efi eib eid eie eif eii fbb fbd fbe fbf fbi fdb fdd fde fdf fdi feb fed fee fef fei ffd ffe fff ffi fib fid fie fif fii i-d i-f ibb ibd ibe ibf ibi idb idd ide idf idi ie- ied iee ief iei ifb ifd ife iff ifi iib iid iie iif iii