C11112331333132311331333133313331333132313121111331312111133133313231323312121   >>    C1111233133313231133133313331333133313231312111133131211113313331323132331212   <<    C11112331333132311331333133313331333132313121111331312111133133313231323312123   >>      C11112331333132311331333133313331333132313121111331312111133133313231323312122   >>