-ic b-u bbb bbc bbd bbe bbi bbo bbs bbu bcb bcc bcd bce bci bco bcs bcu bdb bdc bdd bde bdi bdo bds bdu be- beb bec bed bee bei beo bes beu bi- bib bic bid bie bii bio bis biu bob boc bod boe boi boo bos bou bsb bsc bsd bse bsi bso bss bsu bub buc bud bue bui buo bus buu c-- cbb cbc cbd cbe cbi cbo cbs cbu ccb ccc ccd cce cci cco ccs ccu cdb cdc cdd cde cdi cdo cds cdu ce- ceb cec ced cee cei ceo ces ceu ci- cib cic cid cie cii cio cis ciu co- cob coc cod coe coi coo cos cou csb csc csd cse csi cso css csu cub cuc cud cue cui cuo cus cuu dbb dbc dbd dbe dbi dbo dbs dbu dcb dcc dcd dce dci dco dcs dcu ddb ddc ddd dde ddi ddo dds ddu de- deb dec ded dee dei deo des deu di- dib dic did die dii dio dis diu dob doc dod doe doi doo dos dou dsb dsc dsd dse dsi dso dss dsu dub duc dud due dui duo dus ebb ebc ebd ebe ebi ebo ebs ebu ec- ecb ecc ecd ece eci eco ecs ecu ed- edb edc edd ede edi edo eds edu eeb eec eed eee eeo ees eib eic eid eie eii eio eis eiu eo- eob eoc eod eoe eoi eoo eos eou es- esb esc esd ese esi eso ess esu eu- eub euc eud eue eui eus i-d ibb ibc ibd ibe ibi ibo ibs ibu icb icc icd ice ici ico ics icu idb idc idd ide idi ido ids idu ie- iec ied iee iei ies iib iic iid iie iii iio iis iiu io- iob ioc iod ioe ioi ioo ios iou is- isb isc isd ise isi iso iss isu iu- iub iuc iud iue iui ius o-i ob- obb obc obd obe obi obo obs obu oc- ocb occ ocd oci oco ocs ocu odb odc odd ode odi odo ods odu oeb oec oed oee oei oeo oes oib oic oid oie oii oio ois oiu oo- oob ooc ood ooi ooo oos os- osb osc osd ose osi oso oss osu ou- ouc oud oue oui ouo ous sbb sbc sbd sbe sbi sbo sbs sbu scb scc scd sce sci sco scs scu sdb sdc sdd sde sdi sdo sds sdu se- seb sec sed see sei seo ses seu sib sic sid sie sii sio sis siu sob soc sod soe soi soo sos sou ss- ssb ssc ssd sse ssi sso sss ssu sub suc sud sue sui suo sus suu ubb ubc ube ubi ubo ubs ubu ucb ucc ucd uce uci uco ucs ucu udb udc udd ude udi udo uds udu ueb uec ued uee uei ues uib uic uid uie uii uio uis uiu uob uoc uod uoe uoo uos usb usc usd use usi uso uss usu uuc uue uus uuu