C1111233131211111211113313331333133313231323331333131133132213311   >>    C111123313121111121111331333133313331323132333133313113313221331   <<    C1111233131211111211113313331333133313231323331333131133132213313   >>      C1111233131211111211113313331333133313231323331333131133132213312   >>