-er -ic bbb bbc bbe bbi bbn bbo bbr bbt bcb bcc bce bci bcn bco bcr bct be- beb bec bee bei ben beo ber bet bi- bib bic bie bii bin bio bir bit bnb bnc bne bni bnn bno bnr bnt bob boc boe boi bon boo bor bot brb bre bri brn bro brr brt btb btc bte bti btn bto btr btt c-- cbb cbc cbe cbi cbn cbo cbr cbt ccb ccc cce cci ccn cco ccr cct ce- ceb cec cee cei cen ceo cer cet ci- cib cic cie cii cin cio cir cit cn- cnb cnc cne cni cnn cno cnr cnt co- cob coc coe coi con coo cor cot crb crc cre cri crn cro crr crt ctb ctc cte cti ctn cto ctr ctt ebb ebc ebe ebi ebn ebo ebr ebt ec- ecb ecc ece eci ecn eco ecr ect eeb eec eee een eeo eer eet eib eic eie eii ein eio eir eit en- enb enc ene eni enn eno enr ent eo- eob eoc eoe eoi eon eoo eor eot erb erc ere eri ern ero err ert etb etc ete eti etn eto etr ett ibb ibc ibe ibi ibn ibo ibr ibt icb icc ice ici icn ico icr ict ie- iec iee iei ien ier iet iib iic iie iii iin iio iir iit in- inb inc ine ini inn ino inr int io- iob ioc ioe ioi ion ioo ior iot ir- irb irc ire iri irn iro irr irt itb itc ite iti itn ito itt n-i nbb nbc nbe nbi nbn nbo nbr nbt ncb ncc nce nci ncn nco ncr nct ne- neb nec nee nei nen neo ner net nib nic nie nii nin nio nir nit nnb nnc nne nni nnn nno nnt no- nob noc noe noi non noo nor not nrb nrc nre nri nrn nro nrr nrt ntb ntc nte nti ntn nto ntr ntt o-i ob- obb obc obe obi obn obo obr obt oc- ocb occ oci ocn oco ocr oct oeb oec oee oei oen oeo oer oet oib oic oie oii oin oio oir oit on- onb onc one oni onn ono onr ont oo- oob ooc ooi oon ooo oor oot or- orb orc ore ori orn oro orr ort ot- otb otc ote oti otn oto otr ott rbb rbc rbe rbi rbn rbo rbr rbt rcb rcc rce rci rcn rco rcr rct re- reb rec ree rei ren reo rer ret rib ric rie rii rin rio rir rit rnb rnc rni rnn rno rnr rnt rob roc roe roi ron roo ror rot rrb rrc rri rrn rrr rrt rtb rtc rte rti rtn rto rtr rtt tbb tbc tbe tbi tbn tbo tbr tbt tcb tcc tce tci tcn tco tcr tct te- teb tec tee tei ten teo ter tet tib tic tie tii tin tio tir tit tnb tnc tne tni tnn tno tnr tnt to- tob toc toe toi ton too tor tot trb trc tre tri trn tro trr trt ttb ttc tte tti ttn tto ttr ttt