import re

regex = r"^Encryption Algorithms:([\w-]+(?:,[\w-]+)*)"

test_str = ("SSH Enabled - version 2.0\n"
            "Authentication methods:publickey,keyboard-interactive,password\n"
            "Encryption Algorithms:aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc\n"
            "MAC Algorithms:hmac-sha1,hmac-sha1-96\n"
            "Authentication timeout: 120 secs; Authentication retries: 3\n"
            "Minimum expected Diffie Hellman key size : 1024 bits\n"
            "IOS Keys in SECSH format(ssh-rsa, base64 encoded):")

matches = re.search(regex, test_str, re.MULTILINE)
if matches:
    print(matches.group(1).split(","))