C1111133313331323223313331333133313311211111211331333131211111211113333221   >>    C111113331333132322331333133313331331121111121133133313121111121111333322   <<    C1111133313331323223313331333133313311211111211331333131211111211113333223   >>      C1111133313331323223313331333133313311211111211331333131211111211113333222   >>