def get_backup_extension():
    backup_type = input("Enter backup type (md, pdf, html, text): ").strip().lower()
    if backup_type in ["md", "markdown"]:
        return "markdown"
    elif backup_type == "pdf":
        return "PDF"
    elif backup_type == "html":
        return "HTML"
    elif backup_type in ["plain", "text", "txt", "plain_text"]:
        return "Plaintext"
    else:
        raise ValueError("Unsupported backup type")


def set_backup_extension_filetype(backup_type):
    if backup_type == "markdown":
        return ".md"
    elif backup_type == "PDF":
        return ".pdf"
    elif backup_type == "HTML":
        return ".html"
    elif backup_type == "Plaintext":
        return ".txt"
    else:
        print("Error file type not found")