% Delete letters that have outlived their usefulness
ъ -> 0 / _

% Get rid of palatalization on ɕ and ʒ
ɕʲ -> ɕ / _
ʒʲ -> ʒ / _

% palatalize
 t͡ɕ -> t͡ɕʲ / _

% Lengthen palatalized ʂ
ʂʲ -> ʂʲː / _