anchor.diff:  ou,u
   oû,u
   oue,u
  -oy,way
  +oy,waj
   u,y
   ù,y
   û,y
   ue,ɥɛ
  +ui,ɥi
   ɥ,ɥ
   cqu,k
   cte,t
   qu,k
   q,k
  -ti,tj
  +tion,sjɔ̃
   uil,ɥil
   gu,ɡ
   il,il
  
positive.code: a,a
  á,a
  à,a
  â,ɑ
  ai,ɛ
  ain,ɛn
  aî,ɛ
  aï,ai
  aie,ɛ
  aou,au
  aoû,au
  au,o
  ay,ɛ
  aye,ɛj
  e,ə
  é,e
  ée,e
  
negative.code: ö,ɔ
  ô,o
  œ,œ
  oe,œ
  oê,wa
  oë,ɔɛ
  œu,œ
  