Mei chatas does not become [valid] mei chatas except with the placement of [the parah adumah] ashes.  A beis hapras does not create [another] beis hapras, [there is] no terumah after terumah, a temurah cannot make a temurah, and the offspring [of an offering] cannot make a temurah. R’ Yehudah says: The offspring [of an offering] can make a temurah. They said to [R’ Yehudah]: A con- secrated offering can make a temurah, [but] neither the offspring [of an offering] nor a temurah can make a temurah.