C11111211113313112113313331333133313331333132311233133313331333133311233121   >>    C1111121111331311211331333133313331333133313231123313331333133313331123312   <<    C11111211113313112113313331333133313331333132311233133313331333133311233123   >>      C11111211113313112113313331333133313331333132311233133313331333133311233122   >>