-ic bbb bbc bbe bbg bbi bbo bcb bcc bce bcg bci bco be- beb bec bee beg bei beo bgb bgc bge bgg bgi bgo bi- bib bic bie big bii bio bob boc boe bog boi boo c-- cbb cbc cbe cbg cbi cbo ccb ccc cce ccg cci cco ce- ceb cec cee ceg cei ceo cgb cgc cge cgg cgi cgo ci- cib cic cie cig cii cio co- cob coc coe cog coi coo ebb ebc ebe ebg ebi ebo ec- ecb ecc ece ecg eci eco eeb eec eee eeg eeo egb egc ege egg egi ego eib eic eie eig eii eio eo- eob eoc eoe eog eoi eoo gbc gbe gbg gbi gbo gcb gcc gce gcg gci gco ge- geb gec gee geg gei geo ggb ggc ggg ggi ggo gib gic gie gig gii gio gob goc goe gog goi goo ibb ibc ibe ibg ibi ibo icb icc ice icg ici ico ie- iec iee ieg iei igb igc ige igg igi igo iib iic iie iii iio io- iob ioc ioe iog ioi ioo o-i ob- obb obc obe obg obi obo oc- ocb occ ocg oci oco oeb oec oee oeg oei oeo ogc oge ogg ogi ogo oib oic oie oii oio oo- oob ooc oog ooi ooo