-ic bbb bbc bbd bbe bbi bbo bbs bbx bcb bcc bcd bce bci bco bcs bcx bdb bdc bdd bde bdi bdo bds bdx be- beb bec bed bee bei beo bes bex bi- bib bic bid bie bii bio bis bix bob boc bod boe boi boo bos box bsb bsc bsd bse bsi bso bss bsx bxb bxd bxi bxo bxx c-- cbb cbc cbd cbe cbi cbo cbs cbx ccb ccc ccd cce cci cco ccs ccx cdb cdc cdd cde cdi cdo cds cdx ce- ceb cec ced cee cei ceo ces cex ci- cib cic cid cie cii cio cis cix co- cob coc cod coe coi coo cos cox csb csc csd cse csi cso css csx cxc cxi cxo cxs cxx dbb dbc dbd dbe dbi dbo dbs dbx dcb dcc dcd dce dci dco dcs dcx ddb ddc ddd dde ddi ddo dds ddx de- deb dec ded dee dei deo des dex di- dib dic did die dii dio dis dix dob doc dod doe doi doo dos dox dsb dsc dsd dse dsi dso dss dsx dxc dxd dxi dxo dxs dxx ebb ebc ebd ebe ebi ebo ebs ebx ec- ecb ecc ecd ece eci eco ecs ecx ed- edb edc edd ede edi edo eds edx eeb eec eed eee eeo ees eex eib eic eid eie eii eio eis eix eo- eob eoc eod eoe eoi eoo eos es- esb esc esd ese esi eso ess esx ex- exc exd exe exi exo exs exx i-d ibb ibc ibd ibe ibi ibo ibs ibx icb icc icd ice ici ico ics idb idc idd ide idi ido ids idx ie- iec ied iee iei ies iex iib iic iid iie iii iio iis iix io- iob ioc iod ioe ioi ioo ios is- isb isc isd ise isi iso iss ixc ixe ixi o-i ob- obb obc obd obe obi obo obs obx oc- ocb occ ocd oci oco ocs ocx odb odc odd ode odi odo ods oeb oec oed oee oei oeo oes oex oib oic oid oie oii oio ois oo- oob ooc ood ooi ooo oos oox os- osb osc osd ose osi oso oss osx ox- oxb oxc oxi oxo oxx sbb sbc sbd sbe sbi sbo sbs sbx scb scc scd sce sci sco scs scx sdb sdc sdd sde sdi sdo sds se- seb sec sed see sei seo ses sex sib sic sid sie sii sio sis six sob soc sod soe soi soo sos sox ss- ssb ssc ssd sse ssi sso sss ssx sxc sxi sxs xbc xbe xbx xcb xcd xci xcx xdb xdc xde xdi xds xed xee xes xex xic xie xii xio xis xix xoc xod xoi xoo xos xox xsb xsc xsi xss xxi xxo xxx