8.4.2 aTkupvANnumvyavAyo'pi
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'aT', 'ku', 'pu', 'AN', and 'num' are permitted to intervene i.e. dental 'n' is transformed to cerebral 'NN' if these are the only intervening letters (between 'r' or 'SH' and the 'n'). See {8.4.1}.
