def x0
import bend-collections-laws-crypto@1.0.0.0/spec/math/random.bend as Randomimport Base
import bend-collections-laws-crypto@1.0.0.0/src/math/u64.bend as W
import bend-collections-laws-crypto@1.0.0.0/spec/math/w64.bend as SW
import bend-collections-laws-crypto@1.0.0.0/spec/math/random/source.bend as SRC
131def x0(~S: Data, ~next: S -> W.U64 & S, +s: S) -> Nat:
132 SW.value(SRC.fst64(S, next(s)))