aa: complex = complex(10, 20)
ab: complex = complex(10, 20.0)
ac: complex = complex(10.0, 20)
ad: complex = complex(10.0, 20.0)
b: int = int(10)
c: int = int("10")
d: int = int(10.2)
e: float = float(10)
f: float = float(2.3)
g: float = float("30")
h: bool = bool(True)
i: str = str(10)
j: str = str("hello world")
k: str = str(20.0)
l: str = str(complex(3, 1))
m: str = str(True)