better symetry Nim
{0} ++
-{0} + +++++ ++
+{0} ++ ++++++ ++
{0} ++++++++++++++++++++++++++++++++
{0} ++++++++++++++++++++++++++++++++++
{0} + +++++++++++++++++++++++++++++++++++++++ +
{0} +++++ +++++
{1} ? {0}++ ++ {1}?
{1} ? ?
-{1} ?? ???? ??
+{1} ?? ????? ??
{1} ???? ????????? ????
{1} ?????? ????????????????? ??????
{1} ????????????????????????????????????
