def recurrence
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/sha.bend as Shaimport Base
94def recurrence(+history: List<&2, U32>) -> U32:
95 (sigma1(previous(history, 2n)) + previous(history, 7n)
96 + sigma0(previous(history, 15n)) + previous(history, 16n) : U32)