diff --git a/solutions/python/card-games/2/lists.py b/solutions/python/card-games/2/lists.py
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+++ b/solutions/python/card-games/2/lists.py
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+"""
+Functions for tracking poker hands and assorted card tasks.
+
+Python list documentation: https://docs.python.org/3/tutorial/datastructures.html
+"""
+
+
+def get_rounds(number: int) -> list[int]:
+    """
+    Create a list containing the current and next two round numbers.
+
+    :param number: int - current round number.
+    :return: list - current round and the two that follow.
+    """
+    return [number, number + 1, number + 2]
+
+
+def concatenate_rounds(rounds_1: list[int],
+                       rounds_2: list[int]) -> list[int]:
+    """
+    Concatenate two lists of round numbers.
+
+    :param rounds_1: list - first rounds played.
+    :param rounds_2: list - second set of rounds played.
+    :return: list - all rounds played.
+    """
+    return rounds_1 + rounds_2
+
+
+def list_contains_round(rounds: list[int], number: int) -> bool:
+    """
+    Check if the list of rounds contains the specified number.
+
+    :param rounds: list - rounds played.
+    :param number: int - round number.
+    :return: bool - was the round played?
+    """
+    return number in rounds
+
+
+def card_average(hand: list[list]) -> float:
+    """
+    Calculate and returns the average card value from the list.
+
+    :param hand: list - cards in hand.
+    :return: float - average value of the cards in the hand.
+    """
+    return sum(hand) / len(hand)
+
+
+def approx_average_is_average(hand: list[int]) -> bool:
+    """
+    Return if the (average of first and last card values) OR ('middle' card) == calculated average.
+
+    :param hand: list - cards in hand.
+    :return: bool - does one of the approximate averages equal the `true average`?
+    """
+    avg: float = card_average(hand)
+    return (hand[0] + hand[-1]) / 2 == avg or hand[len(hand) // 2] == avg
+
+
+def average_even_is_average_odd(hand: list[int]) -> bool:
+    """
+    Return if the (average of even indexed card values) == (average of odd indexed card values).
+
+    :param hand: list - cards in hand.
+    :return: bool - are even and odd averages equal?
+    """
+    even = hand[::2]
+    odd = hand[1::2]
+    return sum(even) / len(even) == sum(odd) / len(odd)
+
+
+def maybe_double_last(hand: list[int]) -> list[int]:
+    """
+    Multiply a Jack card value in the last index position by 2.
+
+    :param hand: list - cards in hand.
+    :return: list - hand with Jacks (if present) value doubled.
+    """
+    return hand if hand[-1] != 11 else hand[:-1] + [(hand[-1] * 2)]