start: header _NL row+
header: "#" " "? (WORD _SEPARATOR?)+
row: (_anything _SEPARATOR?)+ _NL
_anything: INT | WORD | NON_SEPARATOR_STRING | FLOAT | SIGNED_FLOAT
NON_SEPARATOR_STRING: /[a-zA-z.;\\\/]+/
_SEPARATOR: /[  ]+/
          | "\t"
          | ","

%import common.NEWLINE -> _NL
%import common.WORD
%import common.INT
%import common.FLOAT
%import common.SIGNED_FLOAT