*jou2jiou
*hsou2hsiou
-derive/^yu/iu
derive&xform/v_u_i/dsh_sh_tch
-xform/iu/ü
-derive/^w/v
derive/^dsh([^i])/v
derive/^([dt]?j)y(u)//&-derive/v_u_i/dsh_sh_tch/
-derive/^tch/ch
xform/c([^h])([a-gi-z]+)?/ts
xform/c([^h])([a-z]+)?/ts