def merge_list(list_x, list_y):
    """
    Merge two list and remove the duplicated items
    """
    merged_list = []
    for item in list_x:
        if item in merged_list:
            continue
        merged_list.append(item)
    for item in list_y:
        if item in merged_list:
            continue
        merged_list.append(item)
    return merged_list