-ic bbb bbc bbd bbe bbi bbo bbs bcb bcc bcd bce bci bco bcs bcv bdb bdc bdd bde bdi bdo bds bdv be- beb bec bed bee bei beo bes bev bi- bib bic bid bie bii bio bis biv bob boc bod boe boi boo bos bov bsb bsc bsd bse bsi bso bss bsv bvb bvc bvd bve bvi bvo bvs bvv c-- cbb cbc cbd cbe cbi cbo cbs cbv ccb ccc ccd cce cci cco ccs ccv cdb cdc cdd cde cdi cdo cds cdv ce- ceb cec ced cee cei ceo ces cev ci- cib cic cid cie cii cio cis civ co- cob coc cod coe coi coo cos cov csb csc csd cse csi cso css csv cvb cvc cvd cve cvi cvo cvs cvv dbb dbc dbd dbe dbi dbo dbs dbv dcb dcc dcd dce dci dco dcs dcv ddb ddc ddd dde ddi ddo dds de- deb dec ded dee dei deo des dev di- dib dic did die dii dio dis div dob doc dod doe doi doo dos dov dsb dsc dsd dse dsi dso dss dsv dvb dvc dvd dve dvi dvs ebb ebc ebd ebe ebi ebo ebs ebv ec- ecb ecc ecd ece eci eco ecs ecv ed- edb edc edd ede edi edo eds eeb eec eed eee eeo ees eev eib eic eid eie eii eio eis eiv eo- eob eoc eod eoe eoi eoo eos es- esb esc esd ese esi eso ess esv evb evc evd eve evi evo evs evv i-d i-v ibb ibc ibd ibe ibi ibo ibs ibv icb icc icd ice ici ico ics icv idb idc idd ide idi ido ids idv ie- iec ied iee iei ies iev iib iic iid iie iii iio iis io- iob ioc iod ioe ioi ioo ios iov is- isb isc isd ise isi iso iss isv ivb ivc ivd ive ivi ivo ivs ivv o-i ob- obb obc obd obe obi obo obs obv oc- ocb occ ocd oci oco ocs ocv odb odc odd ode odi odo ods odv oeb oec oed oee oei oeo oes oib oic oid oie oii oio ois oiv oo- oob ooc ood ooi ooo oos oov os- osb osc osd ose osi oso oss osv ov- ovb ovc ovd ove ovi ovo ovs ovv sbb sbc sbd sbe sbi sbo sbs sbv scb scc scd sce sci sco scs scv sdb sdc sdd sde sdi sdo sds sdv se- seb sec sed see sei seo ses sev sib sic sid sie sii sio sis siv sob soc sod soe soi soo sos sov ss- ssb ssc ssd sse ssi sso sss ssv svb svc svd sve svi svo svs svv v-e vbc vbd vbi vbo vbs vbv vcc vcd vce vci vco vcs vdb vdc vdd vde vdi vdo vds vdv veb vec ved vee vei veo ves vi- vib vic vid vie vii vio vis viv vob voc vod voe voi voo vos vov vsb vsc vsd vse vsi vso vss vsv vvb vvc vvi vvo vvs vvv