D1121323223313223313112113313231133132333132333132313231323121121   >>    D112132322331322331311211331323113313233313233313231323132312112   <<    D1121323223313223313112113313231133132333132333132313231323121123   >>      D1121323223313223313112113313231133132333132333132313231323121122   >>