C1111233131211111211113313331333133313331333133313331333133313233213221211   >>    C111123313121111121111331333133313331333133313331333133313331323321322121   <<    C1111233131211111211113313331333133313331333133313331333133313233213221213   >>      C1111233131211111211113313331333133313331333133313331333133313233213221212   >>