C1111133313331323223313331333133313331333131211111211331313312321   >>    C111113331333132322331333133313331333133313121111121133131331232   <<    C1111133313331323223313331333133313331333131211111211331313312323   >>      C1111133313331323223313331333133313331333131211111211331313312322   >>