-ic bbb bbc bbd bbe bbi bbn bbt bcb bcc bcd bce bci bcn bct bdb bdc bdd bde bdi bdt be- beb bec bed bee bei ben bet bi- bib bic bid bie bii bin bit bnb bnc bnd bne bni bnn bnt btb btc btd bte bti btn btt c-- cbb cbc cbd cbe cbi cbn cbt ccb ccc ccd cce cci ccn cct cdb cdc cdd cde cdi cdn cdt ce- ceb cec ced cee cei cen cet ci- cib cic cid cie cii cin cit cn- cnb cnc cnd cne cni cnn cnt ctb ctc ctd cte cti ctn ctt dbb dbc dbd dbe dbi dbn dbt dcb dcc dcd dce dci dcn dct ddb ddc ddd dde ddi ddn ddt de- deb dec ded dee dei den det di- dib dic did die dii din dit dnb dnc dnd dne dni dnn dnt dtb dtc dtd dte dti dtn dtt ebb ebc ebd ebe ebi ebn ebt ec- ecb ecc ecd ece eci ecn ect ed- edb edc edd ede edi edn edt eeb eec eed eee een eet eib eic eid eie eii ein eit en- enb enc end ene eni enn ent etb etc etd ete eti etn ett i-d ibb ibc ibd ibe ibi ibn ibt icb icc icd ice ici icn ict idb idc idd ide idi idn idt ie- iec ied iee iei ien iet iib iic iid iie iii iin iit in- inb inc ind ine ini inn int itb itc itd ite iti itn itt n-i nbb nbc nbd nbe nbi nbn nbt ncb ncc ncd nce nci ncn nct ndb ndc ndd nde ndi ndn ndt ne- neb nec ned nee nei nen net nib nic nid nie nii nin nit nnb nnc nne nni nnn nnt ntb ntc ntd nte nti ntn ntt tbb tbc tbd tbe tbi tbn tbt tcb tcc tcd tce tci tcn tct tdb tdc tdd tde tdi tdn tdt te- teb tec ted tee tei ten tet tib tic tid tie tii tin tit tnb tnc tnd tne tni tnn tnt ttb ttc ttd tte tti ttn ttt