C11111211113313112113313331333133313331333132311233133313331123311   >>    C1111121111331311211331333133313331333133313231123313331333112331   <<    C11111211113313112113313331333133313331333132311233133313331123313   >>      C11111211113313112113313331333133313331333132311233133313331123312   >>