D1121323223313223313112113313231133132333132333132313231331123232211   >>    D112132322331322331311211331323113313233313233313231323133112323221   <<    D1121323223313223313112113313231133132333132333132313231331123232213   >>      D1121323223313223313112113313231133132333132333132313231331123232212   >>