use '?' for JOKER (blank)

From letters B, A, C, K, B, E, A, T, S  I made following words

9 letter words

backbeats[19]

8 letter words

backbeat[18], backstab[18], backseat[16], seatback[16]

7 letter words

backset[15], setback[15]

6 letter words

babkas[14], kababs[14], kebabs[14], basket[12], casket[12], sabbat[10], abates[8]

5 letter words

babka[13], kabab[13], aback[13], kebab[13], backs[13], becks[13], bakes[11], beaks[11], cakes[11], stack[11], tacks[11], abbas[9], babas[9], abbes[9], babes[9], katas[9], takas[9], skate[9], stake[9], steak[9], takes[9], teaks[9], abase[7], abate[7], aceta[7], abets[7], baste[7], bates[7], beast[7], beats[7], betas[7], tabes[7], caste[7], cates[7], cesta[7], taces[7]

4 letter words

back[12], beck[12], bake[10], beak[10], cake[10], bask[10], kabs[10], cask[10], sack[10], tack[10], abba[8], baba[8], abbe[8], babe[8], cabs[8], scab[8], ebbs[8], kaas[8], kaes[8], keas[8], sake[8], kata[8], taka[8], take[8], teak[8], kats[8], skat[8], task[8], abas[6], baas[6], casa[6], base[6], sabe[6], aces[6], case[6], acta[6], abet[6], bate[6], beat[6], beta[6], cate[6], tace[6], bast[6], bats[6], stab[6], tabs[6], acts[6], cast[6], cats[6], scat[6], best[6], bets[6], sect[6], asea[4], ates[4], east[4], eats[4], etas[4], sate[4], seat[4], seta[4], teas[4]

3 letter words

kab[9], cab[7], ebb[7], kae[7], kea[7], ask[7], kas[7], ska[7], kat[7], tsk[7], aba[5], baa[5], ace[5], abs[5], bas[5], sab[5], sac[5], bes[5], sec[5], bat[5], tab[5], act[5], cat[5], bet[5], aas[3], sae[3], sea[3], ate[3], eat[3], eta[3], tae[3], tea[3], sat[3], tas[3], set[3]

2 letter words

ka[6], ab[4], ba[4], be[4], aa[2], ae[2], as[2], es[2], at[2], ta[2], et[2]