-ic bbb bbc bbg bbi bbn bbo bbs bbt bcb bcc bcg bci bcn bco bcs bct bgb bgc bgg bgi bgn bgo bgs bgt bi- bib bic big bii bin bio bis bit bnb bnc bng bni bnn bno bns bnt bob boc bog boi bon boo bos bot bsb bsc bsg bsi bsn bso bss bst btb btc btg bti btn bto bts btt c-- cbb cbc cbg cbi cbn cbo cbs cbt ccb ccc ccg cci ccn cco ccs cct cgb cgc cgg cgi cgn cgo cgs cgt ci- cib cic cig cii cin cio cis cit cn- cnb cnc cng cni cnn cno cns cnt co- cob coc cog coi con coo cos cot csb csc csg csi csn cso css cst ctb ctc ctg cti ctn cto cts ctt gbc gbg gbi gbn gbo gbs gbt gcb gcc gcg gci gcn gco gcs gct ggb ggc ggg ggi ggn ggo ggs ggt gib gic gig gii gin gio gis git gnb gnc gni gnn gno gns gnt gob goc gog goi gon goo gos got gsb gsc gsg gsi gsn gso gss gst gtb gtc gtg gti gtn gto gts gtt ibb ibc ibg ibi ibn ibo ibs ibt icb icc icg ici icn ico ics ict igb igc igg igi ign igo igs igt iib iic iii iin iio iis iit in- inb inc ing ini inn ino ins int io- iob ioc iog ioi ion ioo ios iot is- isb isc isg isi isn iso iss ist itb itc itg iti itn ito its itt n-i nbb nbc nbg nbi nbn nbo nbs nbt ncb ncc ncg nci ncn nco ncs nct ngb ngc ngg ngi ngn ngo ngs ngt nib nic nig nii nin nio nis nit nnb nnc nng nni nnn nno nns nnt no- nob noc nog noi non noo nos not nsb nsc nsg nsi nsn nso nss nst ntb ntc ntg nti ntn nto nts ntt o-i ob- obb obc obg obi obn obo obs obt oc- ocb occ ocg oci ocn oco ocs oct ogc ogg ogi ogn ogo ogs ogt oib oic oii oin oio ois oit on- onb onc ong oni onn ono ons ont oo- oob ooc oog ooi oon ooo oos oot os- osb osc osg osi osn oso oss ost ot- otb otc otg oti otn oto ots ott sbb sbc sbg sbi sbn sbo sbs sbt scb scc scg sci scn sco scs sct sgb sgc sgg sgi sgn sgo sgs sgt sib sic sig sii sin sio sis sit snb snc sng sni snn sno sns snt sob soc sog soi son soo sos sot ss- ssb ssc ssg ssi ssn sso sss sst stb stc stg sti stn sto sts stt tbb tbc tbg tbi tbn tbo tbs tbt tcb tcc tcg tci tcn tco tcs tct tgb tgc tgg tgi tgn tgo tgs tgt tib tic tig tii tin tio tis tit tnb tnc tng tni tnn tno tns tnt to- tob toc tog toi ton too tos tot tsb tsc tsg tsi tsn tso tss tst ttb ttc ttg tti ttn tto tts ttt