For example: ``` sequence a b c ``` means `a` followed by 'b' followed by 'c', but: ``` sequence (a b c) ``` means `a` or `b` or `c`. Better would probably be to add an explicit or operator such as `|` and use the parentheses only for grouping: ``` sequence a | b | c ```
For example:
means
afollowed by 'b' followed by 'c', but:means
aorborc. Better would probably be to add an explicit or operator such as|and use the parentheses only for grouping: