D1121323223313223313112113313231133132333132311221123232213233311   >>    D112132322331322331311211331323113313233313231122112323221323331   <<    D1121323223313223313112113313231133132333132311221123232213233313   >>      D1121323223313223313112113313231133132333132311221123232213233312   >>