main(r) {
  char i[99], *t, *p;
  for (;;) {
    r = 0;
    scanf("%s", i);
    for (t = strtok(i, "+"); t; t = strtok(0, "+")) {
      for (p = t; *p; p++)
        *p - 48u > 9 ? exit(1) : 0;
      r += atoi(t);
    }
    printf("%d\n", r);
  }
}