+matches at least one character outside the set below:
\[the literal [ (9110 / 1338 / 5B16)
Sthe literal S (8310 / 1238 / 5316) (case insensitive)
Hthe literal H (7210 / 1108 / 4816) (case insensitive)
Uthe literal U (8510 / 1258 / 5516) (case insensitive)
Fthe literal F (7010 / 1068 / 4616) (case insensitive)
Tthe literal T (8410 / 1248 / 5416) (case insensitive)
Xthe literal X (8810 / 1308 / 5816) (case insensitive)
\]the literal ] (9310 / 1358 / 5D16)