-ic bbb bbc bbe bbf bbi bbo bbt bbx bcb bcc bce bcf bci bco bct bcx be- beb bec bee bef bei beo bet bex bfb bfc bfe bff bfi bfo bft bfx bi- bib bic bie bif bii bio bit bix bob boc boe bof boi boo bot box btb btc bte btf bti bto btt btx bxb bxi bxo bxx c-- cbb cbc cbe cbf cbi cbo cbt cbx ccb ccc cce ccf cci cco cct ccx ce- ceb cec cee cef cei ceo cet cex cfb cfc cfe cff cfi cfo cft cfx ci- cib cic cie cif cii cio cit cix co- cob coc coe cof coi coo cot cox ctb ctc cte ctf cti cto ctt ctx cxc cxf cxi cxo cxt cxx ebb ebc ebe ebf ebi ebo ebt ebx ec- ecb ecc ece ecf eci eco ect ecx eeb eec eee eef eeo eet eex ef- efb efc efe eff efi efo eft efx eib eic eie eif eii eio eit eix eo- eob eoc eoe eof eoi eoo eot etb etc ete etf eti eto ett etx ex- exc exe exi exo ext exx fbb fbc fbe fbf fbi fbo fbt fbx fcb fcc fce fcf fci fco fct fcx feb fec fee fef fei feo fet fex ffc ffe fff ffi ffo fft ffx fib fic fie fif fii fit fix fob foc foe fof foi foo fot fox ftb ftc fte ftf fti fto ftt ftx fxe fxi fxt fxx i-f ibb ibc ibe ibf ibi ibo ibt ibx icb icc ice icf ici ico ict ie- iec iee ief iei iet iex ifb ifc ife iff ifi ifo ift ifx iib iic iie iif iii iio iit iix io- iob ioc ioe iof ioi ioo iot itb itc ite itf iti ito itt itx ixc ixe ixi o-i ob- obb obc obe obf obi obo obt obx oc- ocb occ ocf oci oco oct ocx oeb oec oee oef oei oeo oet oex of- ofb ofc ofe off ofi ofo oft ofx oib oic oie oif oii oio oit oo- oob ooc oof ooi ooo oot oox ot- otb otc ote otf oti oto ott ox- oxb oxc oxf oxi oxo oxt oxx t-x tbb tbc tbe tbf tbi tbo tbt tcb tcc tce tcf tci tco tct tcx te- teb tec tee tef tei teo tet tex tfb tfc tfe tff tfi tfo tft tfx tib tic tie tif tii tio tit tix to- tob toc toe tof toi too tot tox ttb ttc tte ttf tti tto ttt ttx txe txf txi txt xbc xbe xbx xcb xcf xci xcx xee xet xex xfe xft xfx xic xie xii xio xit xix xoc xof xoi xoo xot xox xtc xtf xti xtx xxi xxo xxx