-ic bbb bbc bbe bbf bbi bbo bbt bcb bcc bce bcf bci bco bct be- beb bec bee bef bei beo bet bfb bfc bfe bff bfi bfo bft bi- bib bic bie bif bii bio bit bob boc boe bof boi boo bot btb btc bte btf bti bto btt c-- cbb cbc cbe cbf cbi cbo cbt ccb ccc cce ccf cci cco cct ce- ceb cec cee cef cei ceo cet cfb cfc cfe cff cfi cfo cft ci- cib cic cie cif cii cio cit co- cob coc coe cof coi coo cot ctb ctc cte ctf cti cto ctt ebb ebc ebe ebf ebi ebo ebt ec- ecb ecc ece ecf eci eco ect eeb eec eee eef eeo eet ef- efb efc efe eff efi efo eft eib eic eie eif eii eio eit eo- eob eoc eoe eof eoi eoo eot etb etc ete etf eti eto ett fbb fbc fbe fbf fbi fbo fbt fcb fcc fce fcf fci fco fct feb fec fee fef fei feo fet ffc ffe fff ffi ffo fft fib fic fie fif fii fit fob foc foe fof foi foo fot ftb ftc fte ftf fti fto ftt i-f ibb ibc ibe ibf ibi ibo ibt icb icc ice icf ici ico ict ie- iec iee ief iei iet ifb ifc ife iff ifi ifo ift iib iic iie iif iii iio iit io- iob ioc ioe iof ioi ioo iot itb itc ite itf iti ito itt o-i ob- obb obc obe obf obi obo obt oc- ocb occ ocf oci oco oct oeb oec oee oef oei oeo oet of- ofb ofc ofe off ofi ofo oft oib oic oie oif oii oio oit oo- oob ooc oof ooi ooo oot ot- otb otc ote otf oti oto ott tbb tbc tbe tbf tbi tbo tbt tcb tcc tce tcf tci tco tct te- teb tec tee tef tei teo tet tfb tfc tfe tff tfi tfo tft tib tic tie tif tii tio tit to- tob toc toe tof toi too tot ttb ttc tte ttf tti tto ttt