⊦ i2b(i) = i2b(j) ↔ b2i(i2b(i)) = b2i(i2b(j))
~128 ≤ i % 256, i < ~128, i < 0, i < i % 256 ⊦ b2i(i2b(~ i)) = b2i(i2b(~(i % 256)))
Used terms: ~(i % 256), ~ i