-er -ic b-u bbb bbc bbe bbi bbo bbr bbu bcb bcc bce bci bco bcr bcu bcz be- beb bec bee bei beo ber beu bez bi- bib bic bie bii bio bir biu biz bob boc boe boi boo bor bou boz brb bre bri bro brr bru brz bub buc bue bui buo bur buu buz bze bzo bzr bzu bzz c-- cbb cbc cbe cbi cbo cbr cbu cbz ccb ccc cce cci cco ccr ccu ccz ce- ceb cec cee cei ceo cer ceu cez ci- cib cic cie cii cio cir ciu co- cob coc coe coi coo cor cou coz crb crc cre cri cro crr cru crz cub cuc cue cui cuo cur cuu cuz cz- czc cze czo ebb ebc ebe ebi ebo ebr ebu ec- ecb ecc ece eci eco ecr ecu eeb eec eee eeo eer eib eic eie eii eio eir eiu eo- eob eoc eoe eoi eoo eor eou erb erc ere eri ero err eru erz eu- eub euc eue eui eur eze ezo ezr ezz ibb ibc ibe ibi ibo ibr ibu ibz icb icc ice ici ico icr icu icz ie- iec iee iei ier iib iic iie iii iio iir iiu io- iob ioc ioe ioi ioo ior iou ir- irb irc ire iri iro irr iru iu- iub iuc iue iui iur iuz ize izi izo izu izz o-i ob- obb obc obe obi obo obr obu oc- ocb occ oci oco ocr ocu ocz oeb oec oee oei oeo oer oib oic oie oii oio oir oiu oiz oo- oob ooc ooi ooo oor or- orb orc ore ori oro orr oru orz ou- ouc oue oui ouo our oze ozo ozu ozz rbb rbc rbe rbi rbo rbr rbu rcb rcc rce rci rco rcr rcu re- reb rec ree rei reo rer reu rez rib ric rie rii rio rir riz rob roc roe roi roo ror rou roz rrb rrc rri rrr rru rub ruc rue rui ruo rur ruu ruz rzb rze rzo ubb ubc ube ubi ubo ubr ubu ucb ucc uce uci uco ucr ucu ueb uec uee uei uer uib uic uie uii uio uir uiu uob uoc uoe uoo uor ur- urb urc ure uri uro urr uru urz uuc uue uur uuu uzb uzi uzo uzu zbb zbc zbr zce zco zeb zec zee zeo zer zez zib zie zio zir ziz zo- zob zoc zoe zoi zoo zor zou zro zub zuc zui zur zuz zzr zzz