C1111233133313231133133313331333133311221123121111113313232323231   >>    C111123313331323113313331333133313331122112312111111331323232323   <<    C1111233133313231133133313331333133311221123121111113313232323233   >>      C1111233133313231133133313331333133311221123121111113313232323232   >>