-ic b-u bbb bbc bbd bbe bbi bbn bbs bbu bcb bcc bcd bce bci bcn bcs bcu bdb bdc bdd bde bdi bds bdu be- beb bec bed bee bei ben bes beu bi- bib bic bid bie bii bin bis biu bnb bnc bnd bne bni bnn bns bnu bsb bsc bsd bse bsi bsn bss bsu bub buc bud bue bui bun bus buu c-- cbb cbc cbd cbe cbi cbn cbs cbu ccb ccc ccd cce cci ccn ccs ccu cdb cdc cdd cde cdi cdn cds cdu ce- ceb cec ced cee cei cen ces ceu ci- cib cic cid cie cii cin cis ciu cn- cnb cnc cnd cne cni cnn cns cnu csb csc csd cse csi csn css csu cub cuc cud cue cui cun cus cuu dbb dbc dbd dbe dbi dbn dbs dbu dcb dcc dcd dce dci dcn dcs dcu ddb ddc ddd dde ddi ddn dds ddu de- deb dec ded dee dei den des deu di- dib dic did die dii din dis diu dnb dnc dnd dne dni dnn dns dsb dsc dsd dse dsi dsn dss dsu dub duc dud due dui dun dus ebb ebc ebd ebe ebi ebn ebs ebu ec- ecb ecc ecd ece eci ecn ecs ecu ed- edb edc edd ede edi edn eds edu eeb eec eed eee een ees eib eic eid eie eii ein eis eiu en- enb enc end ene eni enn ens enu es- esb esc esd ese esi esn ess esu eu- eub euc eud eue eui eun eus i-d ibb ibc ibd ibe ibi ibn ibs ibu icb icc icd ice ici icn ics icu idb idc idd ide idi idn ids idu ie- iec ied iee iei ien ies iib iic iid iie iii iin iis iiu in- inb inc ind ine ini inn ins inu is- isb isc isd ise isi isn iss isu iu- iub iuc iud iue iui ius n-i nbb nbc nbd nbe nbi nbn nbs nbu ncb ncc ncd nce nci ncn ncs ncu ndb ndc ndd nde ndi ndn nds ndu ne- neb nec ned nee nei nen nes neu nib nic nid nie nii nin nis niu nnb nnc nne nni nnn nns nnu nsb nsc nsd nse nsi nsn nss nsu nub nuc nud nue nui nun nus nuu sbb sbc sbd sbe sbi sbn sbs sbu scb scc scd sce sci scn scs scu sdb sdc sdd sde sdi sdn sds sdu se- seb sec sed see sei sen ses seu sib sic sid sie sii sin sis siu snb snc snd sne sni snn sns snu ss- ssb ssc ssd sse ssi ssn sss ssu sub suc sud sue sui sun sus suu ubb ubc ube ubi ubn ubs ubu ucb ucc ucd uce uci ucn ucs ucu udb udc udd ude udi udn uds udu ueb uec ued uee uei uen ues uib uic uid uie uii uin uis uiu un- unb unc und une uni unn uns unu usb usc usd use usi usn uss usu uuc uue uun uus uuu