::consonant:: = n|z|ɣ|k|s|ɸ|c|m|v|b|w|d|r|l|t|β|ð|j|p|ŋ|θ|ɡ|x|h

% restore final <b>, <d>, <ɡ> 
β -> b / (::consonant::) _ (#|s#)
ð -> d / (::consonant::) _ (#|s#)
ɣ -> ɡ / (::consonant::) _ (#|s#)

% restore initial <b>, <d>, <ɡ> 
β -> b / # _
ð -> d / # _
ɣ -> ɡ / # _ 

% restore <b>, <d> as geminates (sic)
ββ -> bː / _
ðð -> dː / _

% restore <b>, <d>, <g> before consonants
β -> b / (::consonant::) _
ð -> d / (::consonant::) _
ɣ -> ɡ / (::consonant::) _ 

% mark syllabic <l>, <m>, <n>, <r> between consonants

l -> l̥ / (::consonant::) _ (s|#)
m -> m̥ / (::consonant::) _ (s|#)
n -> n̥ / (::consonant::) _ (s|#)
r -> r̥ / (::consonant::) _ (s|#)