C211111133131323223313233313231133132333132311221123232211211311   >>    C21111113313132322331323331323113313233313231122112323221121131   <<    C211111133131323223313233313231133132333132311221123232211211313   >>      C211111133131323223313233313231133132333132311221123232211211312   >>