+# common meaning of second character
+ ! Grave
+ " Double acute accent
+ ' Acute accent
+ ( Breve
+ ) +? Inverted Breve
+ , Cedilla
+ - Macron
+ . Dot Above
+ / Stroke
+ 0 Ring above
+ 2 Hook
+ 8 +? Double Grave
+ 9 Horn
+ 9 + Curl
+ : Diaeresis
+ ; Ogonek (+Retroflex Hook/Tail)
+ < Caron
+ > Circumflex accent
+ ? Tilde
+ _ Line below
+ c + Smallcaps
+ I + Turned
+ S Superscript
+ s Subscript
+
+ = Cyrillic
+ * Greek
+ % Greek/Cyrillic special
+ + lc: Arabic, uc: Hebrew
+ 3 some Latin/Greek/Cyrillic letters
+ 4 Bopomofo
+ 5 Hiragana (also lc + a/e/i/o/u)
+ 6 Katakana (also uc + a/e/i/o/u)
+ J + Korean Jamo (also K)
+ p + IPA extensions
+
+# common first character
+ " combining diacritic
+ ' spacing diacritic
+ R square
+