C22121233131323223313233313231133132333133313113313232313232211   >>    C2212123313132322331323331323113313233313331311331323231323221   <<    C22121233131323223313233313231133132333133313113313232313232213   >>      C22121233131323223313233313231133132333133313113313232313232212   >>