def test_stream_1_10():
input_ = "{{},\n{}}"
output = 5
assert stream_1(input_) == output
def test_stream_1_9():
input_ = "{{<a!>},{<a!>},\n{<a!>},{<ab>}}"
output = 3
assert stream_1(input_) == output
def test_stream_1_1():
input_ = "{}"
output = 1
assert stream_1(input_) == output
def test_stream_1_7():
input_ = "{{<!!>},{<!!>},{<!!>},{<!!>}}"
output = 9
assert stream_1(input_) == output
def test_stream_1_6():
input_ = "{{<ab>},{<ab>},{<ab>},{<ab>}}"
output = 9
assert stream_1(input_) == output
def test_stream_1_5():
input_ = "{<a>,<a>,<a>,<a>}"
output = 1
assert stream_1(input_) == output
def test_stream_1_4():
input_ = "{{{},{},{{}}}}"
output = 16
assert stream_1(input_) == output
def test_stream_1_2():
input_ = "{{{}}}"
output = 6
assert stream_1(input_) == output
