C11111211113313112113313331333133313231311331333132211211321311   >>    C1111121111331311211331333133313331323131133133313221121132131   <<    C11111211113313112113313331333133313231311331333132211211321313   >>      C11111211113313112113313331333133313231311331333132211211321312   >>