law app1
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/poly1305/mac.bend as Macimport Base
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/poly1305/value.bend as V
178law app1:
179 for +t: List<&2, U32>
180 {V.len(List.append(&2, U32, t, [1])) == Nat.add(V.len(t), 1n) : Nat}