C211111133131323223313233313231133132333132311221123231333132321111   >>    C21111113313132322331323331323113313233313231122112323133313232111   <<    C211111133131323223313233313231133132333132311221123231333132321113   >>      C211111133131323223313233313231133132333132311221123231333132321112   >>