C1111233131211111211113313331333132313231323223313331312323132212121   >>    C111123313121111121111331333133313231323132322331333131232313221212   <<    C1111233131211111211113313331333132313231323223313331312323132212123   >>      C1111233131211111211113313331333132313231323223313331312323132212122   >>