-er -ic b-u bbb bbc bbe bbh bbi bbo bbr bbu bcb bcc bce bch bci bco bcr bcu be- beb bec bee beh bei beo ber beu bhb bhc bhe bhh bhi bho bhr bhu bi- bib bic bie bih bii bio bir biu bob boc boe boh boi boo bor bou brb bre brh bri bro brr bru bub buc bue buh bui buo bur buu c-- cbb cbc cbe cbh cbi cbo cbr cbu ccb ccc cce cch cci cco ccr ccu ce- ceb cec cee ceh cei ceo cer ceu ch- chb chc che chh chi cho chr chu ci- cib cic cie cih cii cio cir ciu co- cob coc coe coh coi coo cor cou crb crc cre crh cri cro crr cru cub cuc cue cuh cui cuo cur cuu ebb ebc ebe ebh ebi ebo ebr ebu ec- ecb ecc ece ech eci eco ecr ecu eeb eec eee eeo eer ehb ehc ehe ehh ehi eho ehr ehu eib eic eie eii eio eir eiu eo- eob eoc eoe eoh eoi eoo eor eou erb erc ere erh eri ero err eru eu- eub euc eue eui eur h-i hbb hbc hbe hbh hbi hbo hbr hbu hcb hcc hce hch hci hco hcr he- heb hec hee heh hei heo her heu hhb hhc hhe hhh hhi hho hhr hhu hib hic hie hih hii hio hir hiu hob hoc hoe hoh hoi hoo hor hou hr- hrb hrc hre hrh hri hro hrr hru hub huc hue huh hui huo hur huu ibb ibc ibe ibh ibi ibo ibr ibu icb icc ice ich ici ico icr icu ie- iec iee iei ier ihb ihc ihe ihh ihi iho ihr ihu iib iic iie iih iii iio iir iiu io- iob ioc ioe ioh ioi ioo ior iou ir- irb irc ire iri iro irr iru iu- iub iuc iue iui iur o-i ob- obb obc obe obh obi obo obr obu oc- ocb occ och oci oco ocr ocu oeb oec oee oeh oei oeo oer ohc ohe ohh ohi oho ohr ohu oib oic oie oii oio oir oiu oo- oob ooc ooh ooi ooo oor or- orb orc ore orh ori oro orr oru ou- ouc oue ouh oui ouo our rbb rbc rbe rbh rbi rbo rbr rbu rcb rcc rce rch rci rco rcr rcu re- reb rec ree reh rei reo rer reu rh- rhb rhc rhe rhh rhi rho rhr rhu rib ric rie rih rii rio rir rob roc roe roh roi roo ror rou rrb rrc rrh rri rrr rru rub ruc rue ruh rui ruo rur ruu ubb ubc ube ubh ubi ubo ubr ubu ucb ucc uce uch uci uco ucr ucu ueb uec uee ueh uei uer uhb uhc uhe uhh uhi uho uhr uhu uib uic uie uii uio uir uiu uob uoc uoe uoo uor ur- urb urc ure uri uro urr uru uuc uue uur uuu