C1111233133313231133133313331333133313231232313331333133313332333133321111   >>    C111123313331323113313331333133313331323123231333133313331333233313332111   <<    C1111233133313231133133313331333133313231232313331333133313332333133321113   >>      C1111233133313231133133313331333133313231232313331333133313332333133321112   >>