past[6], spat[6], spaw[5], swap[5], staw[5], swat[5],
pat[5], pst[5], pas[4], psa[4], sap[4], spa[4], paw[4], twa[4], wat[4], swa[3], was[3],
pa[3], at[3], ta[3], ts[3], as[2],
