import java.math.BigInteger;
public class SumBigIntegerHex {
    public static void main(String[] args) {
        BigInteger sum = new BigInteger("0");
        for (int arg = 0; arg < args.length; ++arg) {
            int numberBegin = -1;
            args[arg] += " ";
            for (int pos = 0; pos < args[arg].length(); ++pos) {
                char sym = args[arg].charAt(pos);
                if (Character.isWhitespace(sym) == false) {
                    if (numberBegin == -1)
                        numberBegin = pos;
                } else if (numberBegin != -1) {
                    String strNumber = args[arg].substring(numberBegin, pos);
                    BigInteger number;
                if (strNumber.length() > 1 && (strNumber.charAt(1) == 'x' || strNumber.charAt(1) == 'X'))
                    number = new BigInteger(strNumber.substring(2), 16);
                else
                    number = new BigInteger(strNumber);
                    sum = sum.add(number);
                    numberBegin = -1;
                }
            }
        }
        System.out.println(sum);
    }
}