-ic bbb bbc bbd bbi bbn bbo bbr bbt bcb bcc bcd bci bcn bco bcr bct bdb bdc bdd bdi bdo bdr bdt bi- bib bic bid bii bin bio bir bit bnb bnc bnd bni bnn bno bnr bnt bob boc bod boi bon boo bor bot brb brd bri brn bro brr brt btb btc btd bti btn bto btr btt c-- cbb cbc cbd cbi cbn cbo cbr cbt ccb ccc ccd cci ccn cco ccr cct cdb cdc cdd cdi cdn cdo cdr cdt ci- cib cic cid cii cin cio cir cit cn- cnb cnc cnd cni cnn cno cnr cnt co- cob coc cod coi con coo cor cot crb crc crd cri crn cro crr crt ctb ctc ctd cti ctn cto ctr ctt dbb dbc dbd dbi dbn dbo dbr dbt dcb dcc dcd dci dcn dco dcr dct ddb ddc ddd ddi ddn ddo ddr ddt di- dib dic did dii din dio dir dit dnb dnc dnd dni dnn dno dnr dnt dob doc dod doi don doo dor dot drb drc drd dri drn dro drr drt dtb dtc dtd dti dtn dto dtr dtt i-d ibb ibc ibd ibi ibn ibo ibr ibt icb icc icd ici icn ico icr ict idb idc idd idi idn ido idr idt iib iic iid iii iin iio iir iit in- inb inc ind ini inn ino inr int io- iob ioc iod ioi ion ioo ior iot ir- irb irc ird iri irn iro irr irt itb itc itd iti itn ito itt n-i nbb nbc nbd nbi nbn nbo nbr nbt ncb ncc ncd nci ncn nco ncr nct ndb ndc ndd ndi ndn ndo ndr ndt nib nic nid nii nin nio nir nit nnb nnc nni nnn nno nnt no- nob noc nod noi non noo nor not nrb nrc nrd nri nrn nro nrr nrt ntb ntc ntd nti ntn nto ntr ntt o-i ob- obb obc obd obi obn obo obr obt oc- ocb occ ocd oci ocn oco ocr oct odb odc odd odi odn odo odr odt oib oic oid oii oin oio oir oit on- onb onc ond oni onn ono onr ont oo- oob ooc ood ooi oon ooo oor oot or- orb orc ord ori orn oro orr ort ot- otb otc otd oti otn oto otr ott rbb rbc rbd rbi rbn rbo rbr rbt rcb rcc rcd rci rcn rco rcr rct rdb rdc rdd rdi rdn rdo rdr rdt rib ric rid rii rin rio rir rit rnb rnc rnd rni rnn rno rnr rnt rob roc rod roi ron roo ror rot rrb rrc rrd rri rrn rrr rrt rtb rtc rtd rti rtn rto rtr rtt tbb tbc tbd tbi tbn tbo tbr tbt tcb tcc tcd tci tcn tco tcr tct tdb tdc tdd tdi tdn tdo tdr tdt tib tic tid tii tin tio tir tit tnb tnc tnd tni tnn tno tnr tnt to- tob toc tod toi ton too tor tot trb trc trd tri trn tro trr trt ttb ttc ttd tti ttn tto ttr ttt