-er ddd dde ddl ddq ddr ddu de- ded dee del deq der deu dl- dld dle dll dlr dlu dqe drd dre drl drq drr dru dud due dul dur ed- edd ede edl edr edu eed eee eel eer eld ele ell elr elu eqe eqq equ erd ere erl erq err eru eu- eud eue eul eur ldd lde ldl ldr ldu led lee lel leq ler leu lld lle lll llq llr llu lqr lrd lrr lru lud lue lul lur luu qdr qed qee qqq qqu qre qrl qru qu- qud que qul qur rdd rde rdl rdr rdu re- red ree rel req rer reu rld rle rll rlr rlu rrd rrl rrq rrr rru rud rue rur ruu udd ude udl udr udu ued uee uel uer uld ule ull ulr ulu ur- urd ure url urr uru uue uur uuu