PARSER_BEGIN(LogParser)

public class LogParser 
{
   public static void main(String[] args)
   {
       try {
         LogParser parser = new LogParser(System.in);
         parser.allLines();
       } catch (ParseException e) {
         System.out.println("Error: This is not a valid file.");
       }
   }
}
PARSER_END(LogParser)

TOKEN:
{
    < ENTRY: "entry" >
  | < EXIT: "exit" >
  | < ALARM: "alarm" >
  | < NUM: (["0"-"9"])+ >
  | < CRLF: (["\r","\n"])+ >
  | < WORD: (["a"-"z", "A"-"Z", ",", "0"-"9", "-"])+ >
  | < SPC: ([" ", "\t"])+ >
}

void allLines():
{}
{
   (anyLine())* 
}

void anyLine():
{}
{
   lineOfText() (<CRLF> | <EOF>) 
}

void lineOfText():
{}
{
   entryLine() | exitLine() | alarmLine()
}

void entryLine():
{}
{
   <ENTRY> <SPC> dateTime() <SPC> <WORD> <SPC> restOfLine() 
}

void exitLine():
{}
{
   <EXIT> <SPC> dateTime() <SPC> restOfLine() 
}

void alarmLine():
{}
{
   <ALARM> <SPC> dateTime() <SPC> <WORD> <SPC> restOfLine() 
}

void dateTime():
{}
{
  <NUM> <SPC> <NUM> <SPC> <NUM> <SPC> <NUM> 
}

void restOfLine():
{}
{
  ( <WORD> | <SPC> )*
}