-ic bbb bbc bbf bbi bbn bbo bbr bbt bcb bcc bcf bci bcn bco bcr bct bfb bfc bff bfi bfn bfo bfr bft bi- bib bic bif bii bin bio bir bit bnb bnc bnf bni bnn bno bnr bnt bob boc bof boi bon boo bor bot brb brf bri brn bro brr brt btb btc btf bti btn bto btr btt c-- cbb cbc cbf cbi cbn cbo cbr cbt ccb ccc ccf cci ccn cco ccr cct cfb cfc cff cfi cfn cfo cfr cft ci- cib cic cif cii cin cio cir cit cn- cnb cnc cnf cni cnn cno cnr cnt co- cob coc cof coi con coo cor cot crb crc crf cri crn cro crr crt ctb ctc ctf cti ctn cto ctr ctt fbb fbc fbf fbi fbn fbo fbr fbt fcb fcc fcf fci fcn fco fcr fct ffc fff ffi ffn ffo ffr fft fib fic fif fii fin fir fit fnb fnc fnf fni fnn fnr fnt fob foc fof foi fon foo for fot frb frc frf fri frn fro frr frt ftb ftc ftf fti ftn fto ftr ftt i-f ibb ibc ibf ibi ibn ibo ibr ibt icb icc icf ici icn ico icr ict ifb ifc iff ifi ifn ifo ifr ift iib iic iif iii iin iio iir iit in- inb inc inf ini inn ino inr int io- iob ioc iof ioi ion ioo ior iot ir- irb irc irf iri irn iro irr irt itb itc itf iti itn ito itt n-i nbb nbc nbf nbi nbn nbo nbr nbt ncb ncc ncf nci ncn nco ncr nct nfb nfc nff nfi nfn nfo nfr nft nib nic nif nii nin nio nir nit nnb nnc nnf nni nnn nno nnt no- nob noc nof noi non noo nor not nrb nrc nrf nri nrn nro nrr nrt ntb ntc ntf nti ntn nto ntr ntt o-i ob- obb obc obf obi obn obo obr obt oc- ocb occ ocf oci ocn oco ocr oct of- ofb ofc off ofi ofn ofo ofr oft oib oic oif oii oin oio oir oit on- onb onc onf oni onn ono onr ont oo- oob ooc oof ooi oon ooo oor oot or- orb orc orf ori orn oro orr ort ot- otb otc otf oti otn oto otr ott rbb rbc rbf rbi rbn rbo rbr rbt rcb rcc rcf rci rcn rco rcr rct rfb rfc rff rfi rfn rfo rfr rft rib ric rif rii rin rio rir rit rnb rnc rni rnn rno rnr rnt rob roc rof roi ron roo ror rot rrb rrc rrf rri rrn rrr rrt rtb rtc rtf rti rtn rto rtr rtt tbb tbc tbf tbi tbn tbo tbr tbt tcb tcc tcf tci tcn tco tcr tct tfb tfc tff tfi tfn tfo tfr tft tib tic tif tii tin tio tir tit tnb tnc tnf tni tnn tno tnr tnt to- tob toc tof toi ton too tor tot trb trc trf tri trn tro trr trt ttb ttc ttf tti ttn tto ttr ttt