-er ddd dde ddi ddl ddp ddr de- ded dee dei del dep der dev di- did die dii dil dip dir div dl- dld dle dli dll dlp dlr dlv dpd dpe dpi dpl dpp dpr dpv drd dre dri drl drp drr drv dvd dve dvi dvl dvp dvr ed- edd ede edi edl edp edr eed eee eel eep eer eev eid eie eii eil eip eir eiv eld ele eli ell elp elr elv ep- epd epe epi epl epp epr erd ere eri erl erp err erv evd eve evi evl evp evr evv i-d i-v idd ide idi idl idp idr idv ie- ied iee iei iel iep ier iev iid iie iii iil iip iir il- ild ile ili ill ilp ilr ilv ipd ipe ipi ipl ipp ipr ipv ir- ird ire iri irl irp irr irv ivd ive ivi ivl ivp ivr ivv l-p ldd lde ldi ldl ldp ldr ldv led lee lei lel lep ler lev lid lie lii lil lip lir liv lld lle lli lll llp llr llv lpd lpe lpi lpl lpp lpr lpv lrd lri lrp lrr lrv lvd lve lvi lvl lvp lvr lvv p-p pdd pde pdi pdl pdp pdr pdv ped pee pei pel pep per pev pid pie pii pil pip pir piv pld ple pli pll plp plr plv ppd ppe ppi ppl ppp ppr ppv prd pre pri prl prp prr prv pvd pve pvi pvl pvp pvr pvv rdd rde rdi rdl rdp rdr rdv re- red ree rei rel rep rer rev rid rie rii ril rip rir riv rld rle rli rll rlp rlr rpd rpe rpi rpl rpp rpr rpv rrd rri rrl rrp rrr rvd rve rvi rvl rvp rvr rvv v-e vdd vde vdi vdl vdp vdr vdv ved vee vei vel vep ver vi- vid vie vii vil vip vir viv vl- vld vle vll vlp vlv vpd vpe vpi vpl vpp vpr vrd vre vri vrp vrr vvi vvr vvv