C1111233131211111211113313331333133313221211113313331333133313331211111333211   >>    C111123313121111121111331333133313331322121111331333133313331333121111133321   <<    C1111233131211111211113313331333133313221211113313331333133313331211111333213   >>      C1111233131211111211113313331333133313221211113313331333133313331211111333212   >>