<anb> = <ident-token value="odd"> | <ident-token value="even"> | <number-token> | <dimension-token value="n$"> | <dimension-token value="n-*$"> | <dimension-token value="n$">  <number-token value="^+|-"> | <dimension-token value="n-$"> <number-token value="^0-9"> | <dimension-token value="n$"> [ <delim-token value="+"> | <delim-token value="-"> ] <number-token value="^0-9"> | <delim-token value="+"> <ident-token value="n"> | <delim-token value="+"> <ident-token value="n-*$"> | <delim-token value="+"> <ident-token value="n"> <number-token value="^+|-"> | <delim-token value="+"> <ident-token value="n-"> <number-token value="0-9$"> | <delim-token value="+"> <ident-token value="n"> [ <delim-token value="+"> | <delim-token value="-"> ] <number-token value="0-9$"> | <ident-token value="-n$"> | <ident-token value="-n-*$"> | <ident-token value="-n"> <number-token value="^+|-"> | <ident-token value="-n-"> <number-token value="0-9$"> |  <ident-token value="-n"> [ <delim-token value="+"> | <delim-token value="-"> ] <number-token value="0-9$">
