llej    fPq
   j   jSSSh
 jSh   lfJ D
llllllelgj D
k    D   j D
kLShXxRdSh k
khFqjKhHFhh
    lsk  Pk
     x   lk

This same as revert.agh but using
selfmodifing code.  The input and 
output code is the same, only 3 
instructions are changed.

