anchor.diff:  x,x,vl velar fricative
   ɣ,G,vd velar fricative
   χ,X,vl uvular fricative
  -ʁ,R\,vd uvular fricative
  +ʁ,R,vd uvular fricative
   ħ,X\,vl pharyngeal fricative
   ʕ,?\,vd pharyngeal fricative
   h,h,vl glottal fricative
  
positive.code: ɫ,5,velarized vl alveolar lateral
  ʄ,J\_<,vl palatal implosive
  ʼ,_>,ejective
  ʤ,dZ,vd postalveolar affricate
  ʴ,none,rhotacized
  ɝ,3`,rhotacized open-mid central
  t͡s,ts,voiceless alveolar affricate
  d͡z,dz,voiced alveolar affricate
  t͡ʃ,tS,
  d͡ʒ,dZ,
  t͡ɕ,ts\,
  d͡ʑ,dz\,
  t͡ɬ,tK,
  k͡p,kp,
  g͡b,gb,
  ŋ͡m,Nm,
  ʈ͡ʂ,ts`,
  ɖ͡ʐ,dz`,
  ˩,_B,extra low tone
  ˨,_L,low tone
  ˧,_M,mid tone 
  
negative.code: ʑ,z\,vl alveolopalatal fricative
  ʘ,O\,bilabial click
  ǀ,|\,dental click
  ǃ,!\,click
  ǂ,'=\,alveolar click
  ǁ,|\|\,alveolar lateral click
  ɺ,l\,vl alveolar lateral flap
  