import java.util.*;

class problem0 {
        public static void main(String args[]) {
                Scanner s = new Scanner(System.in);
                int     total = 0;

                while (s.hasNextInt()) {
                        int num = s.nextInt();
                        if (num > 0) {
                                total += num;
                        }
                }
                System.out.println(total + "mm.");
        }
}