C1111133313331323223313331333133313311211111211331333131211333121   >>    C111113331333132322331333133313331331121111121133133313121133312   <<    C1111133313331323223313331333133313311211111211331333131211333123   >>      C1111133313331323223313331333133313311211111211331333131211333122   >>