C211111133131323223313233313231133132333132311221123231333132322331323112113121   >>    C21111113313132322331323331323113313233313231122112323133313232233132311211312   <<    C211111133131323223313233313231133132333132311221123231333132322331323112113123   >>      C211111133131323223313233313231133132333132311221123231333132322331323112113122   >>