Gl2

int str_len(char *s) {
    int i = 0;
    while (s[i]) i++;
    return i;
}

int summer(char *s) {
    static int i;
    if (i == str_len(s)) {
        i = 0;
        return 0;
    }

    if (s[i] >= '0' && s[i] <= '9') {
        i++;
        return s[i-1] - '0' + summer(s);
    }
    else {
        i++;
        return summer(s);
        }
}

int main(char *ss)
{
    printf("%d", summer(ss));
}