Vetch of terumah, Beis Shammai say: We must rub and soak [it] in [a state of] taharah, but we feed [it] in [a state of] tumah. Beis Hillel say: We must soak [it] in taharah, but we [may] rub and feed [it] in [a state of] tumah. Shammai says: They should be eaten dry. R' Akiva says: Everything done with them [may be done] in [a state of] tumah.