category 0: \textbackslash{}
category 1: \{
category 2: \}
category 3: \textdollar{}
category 4: \&
category 5:
category 6: \#
category 7: \^{}
category 8: \_
category 9:
category a:
category b:
category c:
category d: \textasciitilde{}
category e: \%
category f:
also:       \textbar{}
also:       \textless{}
also:       \textgreater{}