-ic bbb bbc bbe bbi bbo bbx bcb bcc bce bci bco bcv bcx be- beb bec bee bei beo bev bex bi- bib bic bie bii bio biv bix bob boc boe boi boo bov box bvb bvc bve bvi bvo bvv bxb bxi bxo bxx c-- cbb cbc cbe cbi cbo cbv cbx ccb ccc cce cci cco ccv ccx ce- ceb cec cee cei ceo cev cex ci- cib cic cie cii cio civ cix co- cob coc coe coi coo cov cox cvb cvc cve cvi cvo cvv cvx cxc cxi cxo cxv cxx ebb ebc ebe ebi ebo ebv ebx ec- ecb ecc ece eci eco ecv ecx eeb eec eee eeo eev eex eib eic eie eii eio eiv eix eo- eob eoc eoe eoi eoo evb evc eve evi evo evv ex- exc exe exi exo exx i-v ibb ibc ibe ibi ibo ibv ibx icb icc ice ici ico icv ie- iec iee iei iev iex iib iic iie iii iio iix io- iob ioc ioe ioi ioo iov ivb ivc ive ivi ivo ivv ivx ixc ixe ixi o-i ob- obb obc obe obi obo obv obx oc- ocb occ oci oco ocv ocx oeb oec oee oei oeo oex oib oic oie oii oio oiv oo- oob ooc ooi ooo oov oox ov- ovb ovc ove ovi ovo ovv ox- oxb oxc oxi oxo oxx v-e vbc vbi vbo vbv vcc vce vci vco vcx veb vec vee vei veo vex vi- vib vic vie vii vio viv vix vob voc voe voi voo vov vox vvb vvc vvi vvo vvv vxv xbc xbe xbx xcb xci xcv xcx xee xev xex xic xie xii xio xiv xix xoc xoi xoo xov xox xvi xxi xxo xxv xxx