D1121323223313223313112113313231133132333132333132313231333133313221211   >>    D112132322331322331311211331323113313233313233313231323133313331322121   <<    D1121323223313223313112113313231133132333132333132313231333133313221213   >>      D1121323223313223313112113313231133132333132333132313231333133313221212   >>