Category Table
 
 (category
  (0x1780 0x17FF ?E) ; anything else
  ...
  (0x1780 0x17B3 ?C) ; cons. & indep. vowel
  (0x17BE        ?A) ; two-part (above) vowel
  (0x17D2        ?H) ; COENG
  ...
  (0x200C        ?N) ; ZWNJ
  (0x200D        ?J) ; ZWJ
  )
 
 Category sequence of is  "CAHC".