C11111211113313112113313331333133313331333132212111133133313211232311   >>    C1111121111331311211331333133313331333133313221211113313331321123231   <<    C11111211113313112113313331333133313331333132212111133133313211232313   >>      C11111211113313112113313331333133313331333132212111133133313211232312   >>