def test_13(): assert nestParen("((yy())))") == False
def test_1(): assert nestParen("((()))") == True
def test_10(): assert nestParen("((y)))") == False
def test_12(): assert nestParen("(())))") == False
def test_7(): assert nestParen("(yy)") == False
def test_6(): assert nestParen("") == True
def test_5(): assert nestParen("()") == True
def test_4(): assert nestParen("((()()") == False
def test_2(): assert nestParen("(((x))") == False