C1111233133313231133133313331333133311221123121111331333131211113323221311   >>    C111123313331323113313331333133313331122112312111133133313121111332322131   <<    C1111233133313231133133313331333133311221123121111331333131211113323221313   >>      C1111233133313231133133313331333133311221123121111331333131211113323221312   >>