C13132313123113313223313133313231133132333132311113313232212111   >>    C1313231312311331322331313331323113313233313231111331323221211   <<    C13132313123113313223313133313231133132333132311113313232212113   >>      C13132313123113313223313133313231133132333132311113313232212112   >>