-er b-u bbb bbc bbe bbh bbo bbr bbu bcb bcc bce bch bco bcr bcu bcv be- beb bec bee beh beo ber beu bev bhb bhc bhe bhh bho bhr bhu bhv bob boc boe boh boo bor bou bov brb bre brh bro brr bru brv bub buc bue buh buo bur buu bvb bvc bve bvh bvo bvr bvu bvv c-- cbb cbc cbe cbh cbo cbr cbu cbv ccb ccc cce cch cco ccr ccu ccv ce- ceb cec cee ceh ceo cer ceu cev ch- chb chc che chh cho chr chu chv co- cob coc coe coh coo cor cou cov crb crc cre crh cro crr cru crv cub cuc cue cuh cuo cur cuu cuv cvb cvc cve cvh cvo cvr cvu cvv ebb ebc ebe ebh ebo ebr ebu ebv ec- ecb ecc ece ech eco ecr ecu ecv eeb eec eee eeo eer eev ehb ehc ehe ehh eho ehr ehu ehv eo- eob eoc eoe eoh eoo eor eou erb erc ere erh ero err eru erv eu- eub euc eue eur euv evb evc eve evh evo evr evv hbb hbc hbe hbh hbo hbr hbu hbv hcb hcc hce hch hco hcr hcv he- heb hec hee heh heo her heu hev hhb hhc hhe hhh hho hhr hhu hhv hob hoc hoe hoh hoo hor hou hov hr- hrb hrc hre hrh hro hrr hru hrv hub huc hue huh huo hur huu huv hv- hvb hvc hvo hvr hvv ob- obb obc obe obh obo obr obu obv oc- ocb occ och oco ocr ocu ocv oeb oec oee oeh oeo oer ohc ohe ohh oho ohr ohu oo- oob ooc ooh ooo oor oov or- orb orc ore orh oro orr oru orv ou- ouc oue ouh ouo our ov- ovb ovc ove ovh ovo ovv rbb rbc rbe rbh rbo rbr rbu rcb rcc rce rch rco rcr rcu rcv re- reb rec ree reh reo rer reu rev rh- rhb rhc rhe rhh rho rhr rhu rhv rob roc roe roh roo ror rou rov rrb rrc rrh rrr rru rub ruc rue ruh ruo rur ruu ruv rvb rvc rve rvh rvo rvr rvu rvv ubb ubc ube ubh ubo ubr ubu ubv ucb ucc uce uch uco ucr ucu ucv ueb uec uee ueh uer uhb uhc uhe uhh uho uhr uhu uhv uob uoc uoe uoo uor ur- urb urc ure uro urr uru uuc uue uur uuu uvb uvc uve uvo uvu uvv v-e vbc vbh vbo vbr vbv vcc vce vch vco vcr vcu veb vec vee veh veo ver veu vh- vhb vhc vhe vho vob voc voe voh voo vor vou vov vrb vrc vre vrh vrr vru vue vur vuv vvb vvc vvo vvr vvv