C11111211113313112113313331333133313331333132212111133133313331323223313121   >>    C1111121111331311211331333133313331333133313221211113313331333132322331312   <<    C11111211113313112113313331333133313331333132212111133133313331323223313123   >>      C11111211113313112113313331333133313331333132212111133133313331323223313122   >>