C1111233133313231133133313331333133313231121333133313331211111133223131   >>    C111123313331323113313331333133313331323112133313331333121111113322313   <<    C1111233133313231133133313331333133313231121333133313331211111133223133   >>      C1111233133313231133133313331333133313231121333133313331211111133223132   >>