D231123313223313132313233313131323223313232113313231311312121121   >>    D23112331322331313231323331313132322331323211331323131131212112   <<    D231123313223313132313233313131323223313232113313231311312121123   >>      D231123313223313132313233313131323223313232113313231311312121122   >>