C211111133131323223313233313231133132333132311221123231333131322121   >>    C21111113313132322331323331323113313233313231122112323133313132212   <<    C211111133131323223313233313231133132333132311221123231333131322123   >>      C211111133131323223313233313231133132333132311221123231333131322122   >>