C11111333133313232233133313331333131133131211113313131121131311   >>    C1111133313331323223313331333133313113313121111331313112113131   <<    C11111333133313232233133313331333131133131211113313131121131313   >>      C11111333133313232233133313331333131133131211113313131121131312   >>