-er -ic b-u bbb bbc bbe bbh bbi bbo bbr bbs bbu bcb bcc bce bch bci bco bcr bcs bcu be- beb bec bee beh bei beo ber bes beu bhb bhc bhe bhh bhi bho bhr bhs bhu bi- bib bic bie bih bii bio bir bis biu bob boc boe boh boi boo bor bos bou brb bre brh bri bro brr brs bru bsb bsc bse bsh bsi bso bsr bss bsu bub buc bue buh bui buo bur bus buu c-- cbb cbc cbe cbh cbi cbo cbr cbs cbu ccb ccc cce cch cci cco ccr ccs ccu ce- ceb cec cee ceh cei ceo cer ces ceu ch- chb chc che chh chi cho chr chs chu ci- cib cic cie cih cii cio cir cis ciu co- cob coc coe coh coi coo cor cos cou crb crc cre crh cri cro crr crs cru csb csc cse csh csi cso csr css csu cub cuc cue cuh cui cuo cur cus cuu ebb ebc ebe ebh ebi ebo ebr ebs ebu ec- ecb ecc ece ech eci eco ecr ecs ecu eeb eec eee eeo eer ees ehb ehc ehe ehh ehi eho ehr ehs ehu eib eic eie eii eio eir eis eiu eo- eob eoc eoe eoh eoi eoo eor eos eou erb erc ere erh eri ero err ers eru es- esb esc ese esh esi eso esr ess esu eu- eub euc eue eui eur eus h-i hbb hbc hbe hbh hbi hbo hbr hbs hbu hcb hcc hce hch hci hco hcr hcs he- heb hec hee heh hei heo her hes heu hhb hhc hhe hhh hhi hho hhr hhs hhu hib hic hie hih hii hio hir his hiu hob hoc hoe hoh hoi hoo hor hos hou hr- hrb hrc hre hrh hri hro hrr hrs hru hsb hsc hse hsh hsi hsr hss hsu hub huc hue huh hui huo hur hus huu ibb ibc ibe ibh ibi ibo ibr ibs ibu icb icc ice ich ici ico icr ics icu ie- iec iee iei ier ies ihb ihc ihe ihh ihi iho ihr ihs ihu iib iic iie iih iii iio iir iis iiu io- iob ioc ioe ioh ioi ioo ior ios iou ir- irb irc ire iri iro irr irs iru is- isb isc ise ish isi iso isr iss isu iu- iub iuc iue iui iur ius o-i ob- obb obc obe obh obi obo obr obs obu oc- ocb occ och oci oco ocr ocs ocu oeb oec oee oeh oei oeo oer oes ohc ohe ohh ohi oho ohr ohs ohu oib oic oie oii oio oir ois oiu oo- oob ooc ooh ooi ooo oor oos or- orb orc ore orh ori oro orr ors oru os- osb osc ose osh osi oso osr oss osu ou- ouc oue ouh oui ouo our ous rbb rbc rbe rbh rbi rbo rbr rbs rbu rcb rcc rce rch rci rco rcr rcs rcu re- reb rec ree reh rei reo rer res reu rh- rhb rhc rhe rhh rhi rho rhr rhs rhu rib ric rie rih rii rio rir ris rob roc roe roh roi roo ror ros rou rrb rrc rrh rri rrr rrs rru rsb rsc rse rsh rsi rso rsr rss rsu rub ruc rue ruh rui ruo rur rus ruu sbb sbc sbe sbh sbi sbo sbr sbs sbu scb scc sce sch sci sco scr scs scu se- seb sec see seh sei seo ser ses seu sh- shb shc she shh shi sho shr shs shu sib sic sie sih sii sio sir sis siu sob soc soe soh soi soo sor sos sou sr- srb src sre srh sri sro srr srs ss- ssb ssc sse ssh ssi sso ssr sss ssu sub suc sue suh sui suo sur sus suu ubb ubc ube ubh ubi ubo ubr ubs ubu ucb ucc uce uch uci uco ucr ucs ucu ueb uec uee ueh uei uer ues uhb uhc uhe uhh uhi uho uhr uhs uhu uib uic uie uii uio uir uis uiu uob uoc uoe uoo uor uos ur- urb urc ure uri uro urr urs uru usb usc use ush usi uso usr uss usu uuc uue uur uus uuu