⊦ i2s(i) = i2s(j) ↔ s2i(i2s(i)) = s2i(i2s(j))
32768 ≤ i, 0 < i, 0 ≤ i ⊦ s2i(i2s(i)) = s2i(i2s(i - 65536))
Used terms: i - 65536, i