deriv LSK ETT STT aSTA ALPH OLDHOMEPAGE NEWHOMEPAGE

@pANini uses first instead of sixth sometimes

Rule SaSThIsthAney... says that the sixth in a sUtra may mean "instead of", but some sUtras have first in that sense, such as —

aa replaces a अ with a अ.

atoyeyaH replaces yA या with iy इय्.

samAseGgul...