pub type P12 = PInt<UInt<UInt<UInt<UInt<UTerm, B1>, B1>, B0>, B0>>;
struct P12 { pub(crate) n: UInt<UInt<UInt<UInt<UTerm, B1>, B1>, B0>, B0>, }
n: UInt<UInt<UInt<UInt<UTerm, B1>, B1>, B0>, B0>