C1111233131211111211113313331333133313221211113313331333133313222313231   >>    C111123313121111121111331333133313331322121111331333133313331322231323   <<    C1111233131211111211113313331333133313221211113313331333133313222313233   >>      C1111233131211111211113313331333133313221211113313331333133313222313232   >>