-er b-u bbb bbe bbi bbq bbr bbt bbu be- beb bee bei beq ber bet beu bi- bib bie bii bir bit biu bqe bqt brb bre bri brq brr brt bru btb bte bti btq btr btt btu bub bue bui bur but buu ebb ebe ebi ebq ebr ebt ebu eeb eee eer eet eib eie eii eir eit eiu eqe eqq eqt equ erb ere eri erq err ert eru etb ete eti etr ett etu eu- eub eue eui eur eut ibb ibe ibi ibr ibt ibu ie- iee iei ier iet iib iie iii iir iit iiu iqe iqt iqu ir- irb ire iri irq irr irt iru itb ite iti itq itt itu iu- iub iue iui iur iut qbe qbq qee qet qie qir qit qiu qqq qqu qrb qre qri qrt qru qti qtq qtr qu- que qui qur qut rbb rbe rbi rbr rbt rbu re- reb ree rei req rer ret reu rib rie rii riq rir rit rrb rri rrq rrr rrt rru rtb rte rti rtq rtr rtt rtu rub rue rui rur rut ruu tbb tbe tbi tbr tbt tbu te- teb tee tei teq ter tet teu tib tie tii tir tit tiu trb tre tri trq trr trt tru ttb tte tti ttr ttt ttu tub tue tui tur tut tuu ubb ube ubi ubr ubt ubu ueb uee uei uer uet uib uie uii uiq uir uit uiu ur- urb ure uri urr urt uru utb ute uti utr utt utu uue uur uut uuu