-ic bbb bbc bbd bbi bbn bbo bbr bbs bcb bcc bcd bci bcn bco bcr bcs bdb bdc bdd bdi bdo bdr bds bi- bib bic bid bii bin bio bir bis bnb bnc bnd bni bnn bno bnr bns bob boc bod boi bon boo bor bos brb brd bri brn bro brr brs bsb bsc bsd bsi bsn bso bsr bss c-- cbb cbc cbd cbi cbn cbo cbr cbs ccb ccc ccd cci ccn cco ccr ccs cdb cdc cdd cdi cdn cdo cdr cds ci- cib cic cid cii cin cio cir cis cn- cnb cnc cnd cni cnn cno cnr cns co- cob coc cod coi con coo cor cos crb crc crd cri crn cro crr crs csb csc csd csi csn cso csr css dbb dbc dbd dbi dbn dbo dbr dbs dcb dcc dcd dci dcn dco dcr dcs ddb ddc ddd ddi ddn ddo ddr dds di- dib dic did dii din dio dir dis dnb dnc dnd dni dnn dno dnr dns dob doc dod doi don doo dor dos drb drc drd dri drn dro drr drs dsb dsc dsd dsi dsn dso dsr dss i-d ibb ibc ibd ibi ibn ibo ibr ibs icb icc icd ici icn ico icr ics idb idc idd idi idn ido idr ids iib iic iid iii iin iio iir iis in- inb inc ind ini inn ino inr ins io- iob ioc iod ioi ion ioo ior ios ir- irb irc ird iri irn iro irr irs is- isb isc isd isi isn iso isr iss n-i nbb nbc nbd nbi nbn nbo nbr nbs ncb ncc ncd nci ncn nco ncr ncs ndb ndc ndd ndi ndn ndo ndr nds nib nic nid nii nin nio nir nis nnb nnc nni nnn nno nns no- nob noc nod noi non noo nor nos nrb nrc nrd nri nrn nro nrr nrs nsb nsc nsd nsi nsn nso nsr nss o-i ob- obb obc obd obi obn obo obr obs oc- ocb occ ocd oci ocn oco ocr ocs odb odc odd odi odn odo odr ods oib oic oid oii oin oio oir ois on- onb onc ond oni onn ono onr ons oo- oob ooc ood ooi oon ooo oor oos or- orb orc ord ori orn oro orr ors os- osb osc osd osi osn oso osr oss rbb rbc rbd rbi rbn rbo rbr rbs rcb rcc rcd rci rcn rco rcr rcs rdb rdc rdd rdi rdn rdo rdr rds rib ric rid rii rin rio rir ris rnb rnc rnd rni rnn rno rnr rns rob roc rod roi ron roo ror ros rrb rrc rrd rri rrn rrr rrs rsb rsc rsd rsi rsn rso rsr rss sbb sbc sbd sbi sbn sbo sbr sbs scb scc scd sci scn sco scr scs sdb sdc sdd sdi sdn sdo sdr sds sib sic sid sii sin sio sir sis snb snc snd sni snn sno snr sns sob soc sod soi son soo sor sos sr- srb src srd sri srn sro srr srs ss- ssb ssc ssd ssi ssn sso ssr sss