%{
/* Author: Ram Samudrala (me@ram.org)
 *
 * February 10, 1995.
 */

/******************************************************************/


#include <stdio.h>
#include "y.tab.h"		/* contains the token definitions */

%}

%%
[ \n\t]+	{ /* ignore whitespace */; }
"#".*           { /* ignore comments -- A comment starts with a '#'
                   * and continues to end of the line, but does not
                   * include the newline character 
                   */     ; 
                }
[aA]		{ return A; }
[cC]		{ return C; }
[gG]		{ return G; }
[uU]		{ return UR; }
.	        { return UNKNOWN; }
%%