def test_single_item_list():
assert solve('5') == 5
def test_hand():
assert solve(3312349912343) == 3 + 9 + 3
def test_empty_list():
assert solve('') == 0
def test_works_with_ints():
assert solve(91212129) == 9
def test_only_circular_match():
assert solve('91212129') == 9
def test_no_equal_digits():
assert solve('1234') == 0
def test_all_equal_digits():
assert solve('1111') == 4
def test_simple():
assert solve('1122') == 3