category 0: \backslash{}
category 1: \{
category 2: \}
category 3: \$
category 4: \&
category 5:
category 6: \#
category 7: \^{}
category 8: \_
category 9:
category a:
category b:
category c:
category d: \~{}
category e: \%
category f:
also:       |
also:       <
also:       >