-ic bbb bbc bbg bbi bbn bbo bbs bcb bcc bcg bci bcn bco bcs bgb bgc bgg bgi bgn bgo bgs bi- bib bic big bii bin bio bis bnb bnc bng bni bnn bno bns bob boc bog boi bon boo bos bsb bsc bsg bsi bsn bso bss c-- cbb cbc cbg cbi cbn cbo cbs ccb ccc ccg cci ccn cco ccs cgb cgc cgg cgi cgn cgo cgs ci- cib cic cig cii cin cio cis cn- cnb cnc cng cni cnn cno cns co- cob coc cog coi con coo cos csb csc csg csi csn cso css gbc gbg gbi gbn gbo gbs gcb gcc gcg gci gcn gco gcs ggb ggc ggg ggi ggn ggo ggs gib gic gig gii gin gio gis gnb gnc gni gnn gno gns gob goc gog goi gon goo gos gsb gsc gsg gsi gsn gso gss ibb ibc ibg ibi ibn ibo ibs icb icc icg ici icn ico ics igb igc igg igi ign igo igs iib iic iii iin iio iis in- inb inc ing ini inn ino ins io- iob ioc iog ioi ion ioo ios is- isb isc isg isi isn iso iss n-i nbb nbc nbg nbi nbn nbo nbs ncb ncc ncg nci ncn nco ncs ngb ngc ngg ngi ngn ngo ngs nib nic nig nii nin nio nis nnb nnc nng nni nnn nno nns no- nob noc nog noi non noo nos nsb nsc nsg nsi nsn nso nss o-i ob- obb obc obg obi obn obo obs oc- ocb occ ocg oci ocn oco ocs ogc ogg ogi ogn ogo ogs oib oic oii oin oio ois on- onb onc ong oni onn ono ons oo- oob ooc oog ooi oon ooo oos os- osb osc osg osi osn oso oss sbb sbc sbg sbi sbn sbo sbs scb scc scg sci scn sco scs sgb sgc sgg sgi sgn sgo sgs sib sic sig sii sin sio sis snb snc sng sni snn sno sns sob soc sog soi son soo sos ss- ssb ssc ssg ssi ssn sso sss