drills[8], drillt[8], rillst[8],
drill[7], dills[7], rillt[7], still[7],
dill[6], rill[6], till[6], lids[5], sild[5], list[5], stil[5], rist[4],
lid[4], dir[3], dis[3], sir[3], ist[3],
si[2], ti[2], st[2],
