% Sources of /j/ before front vowels
ъ -> j / _ (е|ё|ю|я)
0 -> j / # _ (е|ё|ю|я)

% Palatalization
0 -> ʲ / (б|в|д|з|к|л|м|п|р|с|т|ф|х) _ (j|е|ё|и|ю|я)
