-er -ji bbb bbe bbi bbr bbs be- beb bee bei ber bes bi- bib bie bii bij bir bis bji bjj bjr bjs brb bre bri brj brr brs bsb bse bsi bsj bsr bss ebb ebe ebi ebj ebr ebs eeb eee eer ees eib eie eii eij eir eis eji erb ere eri err ers es- esb ese esi esr ess ibb ibe ibi ibj ibr ibs ie- iee iei iej ier ies iib iie iii iij iir iis ijb ije iji ijs ir- irb ire iri irj irr irs is- isb ise isi isj isr iss j-i jbi jbj jbr jbs jeb jee jei jej jer jes jib jie jii jij jir jis jjb jjj jjr jjs jrb jri jrr jrs jsb jse jsi jsj jsr jss rbb rbe rbi rbr rbs re- reb ree rei rer res rib rie rii rir ris rjr rrb rri rrr rrs rsb rse rsi rsj rsr rss sbb sbe sbi sbj sbr sbs se- seb see sei sej ser ses sib sie sii sij sir sis sjb sje sji sjj sjr sjs sr- srb sre sri srj srr srs ss- ssb sse ssi ssj ssr sss