-ic bbb bbc bbg bbi bbo bbs bcb bcc bcg bci bco bcs bgb bgc bgg bgi bgo bgs bi- bib bic big bii bio bis bob boc bog boi boo bos bsb bsc bsg bsi bso bss c-- cbb cbc cbg cbi cbo cbs ccb ccc ccg cci cco ccs cgb cgc cgg cgi cgo cgs ci- cib cic cig cii cio cis co- cob coc cog coi coo cos csb csc csg csi cso css gbc gbg gbi gbo gbs gcb gcc gcg gci gco gcs ggb ggc ggg ggi ggo ggs gib gic gig gii gio gis gob goc gog goi goo gos gsb gsc gsg gsi gso gss ibb ibc ibg ibi ibo ibs icb icc icg ici ico ics igb igc igg igi igo igs iib iic iii iio iis io- iob ioc iog ioi ioo ios is- isb isc isg isi iso iss o-i ob- obb obc obg obi obo obs oc- ocb occ ocg oci oco ocs ogc ogg ogi ogo ogs oib oic oii oio ois oo- oob ooc oog ooi ooo oos os- osb osc osg osi oso oss sbb sbc sbg sbi sbo sbs scb scc scg sci sco scs sgb sgc sgg sgi sgo sgs sib sic sig sii sio sis sob soc sog soi soo sos ss- ssb ssc ssg ssi sso sss