D1121323223313223313112113313231133132333132333132313231333133313121211   >>    D112132322331322331311211331323113313233313233313231323133313331312121   <<    D1121323223313223313112113313231133132333132333132313231333133313121213   >>      D1121323223313223313112113313231133132333132333132313231333133313121212   >>