anchor.diff:  ː,:,length mark
   ˑ,:\,half-length
   ̆,_X,extra-short
  -0,none,syllable break
  +.,.,syllable break
   ʍ,W,vl labial-velar fricative
   w,w,vd labio-velar approximant
   ɥ,H,labial-palatal approximant
  
positive.code: ̴,_e,velarized or pharyngealized
  ̝,_r,raised
  ̞,_o,lowered
  ˀ,_k,glottalized
  ̃,~,nasalized
  ⁿ,_n,nasal release
  ˡ,_l,lateral release
  
negative.code: x,x,vl velar fricative
  ɣ,G,vd velar fricative
  χ,X,vl uvular fricative
  ʁ,R,vd uvular fricative
  ħ,X\,vl pharyngeal fricative
  ʕ,?\,vd pharyngeal fricative
  h,h,vl glottal fricative
  