C1111233131211111211113313331333133313221211113313331333133313233211111   >>    C111123313121111121111331333133313331322121111331333133313331323321111   <<    C1111233131211111211113313331333133313221211113313331333133313233211113   >>      C1111233131211111211113313331333133313221211113313331333133313233211112   >>