C1111233133313231133133313331333133313231121333133313331211111333232212311   >>    C111123313331323113313331333133313331323112133313331333121111133323221231   <<    C1111233133313231133133313331333133313231121333133313331211111333232212313   >>      C1111233133313231133133313331333133313231121333133313331211111333232212312   >>