Revision history of "natural number is even" (Z13555)
Icagura rya Diff: Shira akamenyetso kuri buto radio y'ivyasubiwemwo kugirango ugereranye hama ufyonde injira canke buto hepfo.
Legend: (muri kino gihe) = itandukano kumwe n'isubiramwo ryanyuma, (ubushize) = itandukano kumwe n'isubiramwo riheruka, t = ihinyanyura ritoya.