-er a-a a-b aaa aab aad aae aak aar aaw ab- aba abb abd abe abk abr abw ad- ada adb add ade adk adr adw aea aeb aed aee aek aer aew aka akb akd ake akk akr akw ar- ara arb ard are ark arr arw aw- awa awb awd awe awk awr aww baa bab bad bae bak bar baw bba bbb bbd bbe bbk bbr bbw bda bdb bdd bde bdk bdr bdw be- bea beb bed bee bek ber bew bka bkb bke bkk bkr bkw bra brb brd bre brk brr brw bwa bwb bwd bwk bwr daa dab dad dae dak dar daw dba dbb dbd dbe dbk dbr dda ddb ddd dde ddk ddr ddw de- dea deb ded dee dek der dew dka dkb dke dkk dkr dkw dra drb drd dre drk drr drw dwa dwb dwe dwr dww eaa eab ead eae eak ear eaw eba ebb ebd ebe ebk ebr ebw ed- eda edb edd ede edk edr edw eea eeb eed eee eek eer eew eka ekb ekd eke ekr era erb erd ere erk err erw ewa ewb ewd ewe ewk ewr eww ka- kaa kab kad kae kak kar kaw kba kbb kbd kbe kbk kbr kbw kda kdb kde kdk kdr ke- kea keb ked kee kek ker kew kkb kke kkk kkr kra krd krk krr krw kw- kwa kwd kwk kww ra- raa rab rad rae rak rar raw rba rbb rbd rbe rbk rbr rbw rda rdb rdd rde rdr re- rea reb red ree rek rer rew rkb rke rkk rra rrb rrd rrk rrr rwa rwb rwd rwe rwr waa wab wad wae wak war waw wba wbb wbd wbe wbr wbw wda wdb wdr wea web wed wee wek wer wew wka wkb wkd wke wkr wkw wr- wra wrd wre wrk wrr wrw wwa wwd wwe www