bbb bbd bbe bbf bbi bbt bdb bdd bde bdf bdi bdt be- beb bed bee bef bei bet bfb bfd bfe bff bfi bft bi- bib bid bie bif bii bit btb btd bte btf bti btt dbb dbd dbe dbf dbi dbt ddb ddd dde ddf ddi ddt de- deb ded dee def dei det dfb dfd dfe dff dfi dft di- dib did die dif dii dit dtb dtd dte dtf dti dtt ebb ebd ebe ebf ebi ebt ed- edb edd ede edf edi edt eeb eed eee eef eet ef- efb efd efe eff efi eft eib eid eie eif eii eit etb etd ete etf eti ett fbb fbd fbe fbf fbi fbt fdb fdd fde fdf fdi fdt feb fed fee fef fei fet ffd ffe fff ffi fft fib fid fie fif fii fit ftb ftd fte ftf fti ftt i-d i-f ibb ibd ibe ibf ibi ibt idb idd ide idf idi idt ie- ied iee ief iei iet ifb ifd ife iff ifi ift iib iid iie iif iii iit itb itd ite itf iti itt tbb tbd tbe tbf tbi tbt tdb tdd tde tdf tdi tdt te- teb ted tee tef tei tet tfb tfd tfe tff tfi tft tib tid tie tif tii tit ttb ttd tte ttf tti ttt