options {
    STATIC = false;
}

PARSER_BEGIN(Adder)
import java.io.*;

class Adder {
    static public void main(String[] args) {
        for (String arg: args) {
            try {
            System.out.println(evaluate(arg));
            }
            catch (ParseException ex) {
                System.err.println(ex.getMessage());
            }
        }
    }
    static public long evaluate(String src) throws ParseException {
         Reader reader = new StringReader(src);
         return new Adder(reader).expr();
    }
}
PARSER_END(Adder)

SKIP: { <[" ","\t","\r","\n"]> }

TOKEN: {
    <INTEGER: (["0"-"9"])+>
}

long expr():
{
    Token x, y;
}
{
    x=<INTEGER> "+" y=<INTEGER> <EOF>
        {
            return Long.parseLong(x.image) + Long.parseLong(y.image);
        }
}

import java.util.*;
public class LargestSubsequence {
    public String getLargest(String s) {
        int pos  = 0;
        char best;
        String ret = "";
        while (pos < s.length()) {
        best = s.charAt(pos);
        if(pos == s.length()-1) {
            ret += s.charAt(pos);
            break;
        }
        for(int i = pos+1; i < s.length();i++){
            if(s.charAt(i) > best) {
            best = s.charAt(i);
            pos  = i;
            }
        }
        ret += best;
        pos++;
        }
        return ret;     
    }
}