Kaba class u16 ed

class u16
    var high: u8
    var low: u8

    # operators
    func pure __str__() -> string        # str(u16) -> string
    func pure __i32__() -> i32           # i32(u16) -> i32
    func static __assign__(a: u16, b: u16) # u16 = u16
    func mut __assign__(o: i32)          # u16 = i32