C11111333133313232233133313331333131133132313331322121111133313232212121   >>    C1111133313331323223313331333133313113313231333132212111113331323221212   <<    C11111333133313232233133313331333131133132313331322121111133313232212123   >>      C11111333133313232233133313331333131133132313331322121111133313232212122   >>