张旭，怀素。张指唐朝书法家张旭，素指唐朝开发者_如何转开发书法家怀素。颠指张旭书法的特点：激情勃发，甚至达到狂颠的程度。醉指怀素书法的特点：圆转飞动，空灵剔透的气韵。颠张醉素是指一个人个性突出，挥洒到
How to specify a fixed digit number in antlr grammar? I want to parse a line which contains fields of fixed number of characters. Each field is a number.
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