List * readFileToList() {
    List  * list = List_new();
    char * buffer =  malloc(sizeof(char)*100) ;
    char * stringBuffer =  malloc(sizeof(char)*100) ;
    const char * input = readFileToBuffer("data.txt", buffer, 10000);
    while(input != '\0'){
    if (isdigit(*input))
        {
            while (isdigit(*input))
            {
                StringBuffer_appendChar(stringBuffer, *input);
                input++;
            }
            int* i = malloc(sizeof(int));
            char * buf = StringBuffer_toNewString(stringBuffer);
            *i = atoi(buf);
            free(buf);
            List_add(list, i);
            StringBuffer_clear(stringBuffer);
        }
     input++;
    }
    return list;
}