C11111211113313112113313331333133313331333132212111133133313331323123123311   >>    C1111121111331311211331333133313331333133313221211113313331333132312312331   <<    C11111211113313112113313331333133313331333132212111133133313331323123123313   >>      C11111211113313112113313331333133313331333132212111133133313331323123123312   >>