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gupU;dhUpa;vicchi;paNi;panibhya:: AyaH

गुपूॱधूपॱविच्छिॱपणिॱपनिभ्य‌ आयः ONPANINI 31028

/Aya comes after gup गुप् dhUp धूप् vicch विच्छ् paN पण् pan पन् with no change of meaning.

This /Aya is optional by AyAdaya::... >>>, and /parasmaipada because it has no /Git to make it /Atmanepada.

gopAyati गोपायति "protects"
dhUpAyati धूपायति "heats"
vicchAyati विच्छायति "approaches"
paNAyati पणायति "praises"
panAyati पनायति "praises"

When paN पण् means "contracts", it gets no /Aya — zatasya paNate शतस्य पणते "contracts for a hundred".

/Aya is a /sanAdi.