---------------------------------------------------0---------0----------| -0-------1^0-------1^0-------1-3---1---0---0---------1---------0--------| ---0---------0---------0---------0---0---0---0---------0---------0---0--| -----2-2-------2-2-------2-2-------------------2-2-------2-2------2-2-2-| ------------------------------------------------------------------------| ------------------------------------------------------------------------|