import random

def get_useragent():
    """
    Generates a random user agent string mimicking the format of various software versions.

    The user agent string is composed of:
    - Lynx version: Lynx/x.y.z where x is 2-3, y is 8-9, and z is 0-2
    - libwww version: libwww-FM/x.y where x is 2-3 and y is 13-15
    - SSL-MM version: SSL-MM/x.y where x is 1-2 and y is 3-5
    - OpenSSL version: OpenSSL/x.y.z where x is 1-3, y is 0-4, and z is 0-9

    Returns:
        str: A randomly generated user agent string.
    """
    lynx_version = f"Lynx/{random.randint(2, 3)}.{random.randint(8, 9)}.{random.randint(0, 2)}"
    libwww_version = f"libwww-FM/{random.randint(2, 3)}.{random.randint(13, 15)}"
    ssl_mm_version = f"SSL-MM/{random.randint(1, 2)}.{random.randint(3, 5)}"
    openssl_version = f"OpenSSL/{random.randint(1, 3)}.{random.randint(0, 4)}.{random.randint(0, 9)}"
    return f"{lynx_version} {libwww_version} {ssl_mm_version} {openssl_version}"