C111123313331323113313331323133313231323132322331323133313113311233131212121   >>    C11112331333132311331333132313331323132313232233132313331311331123313121212   <<    C111123313331323113313331323133313231323132322331323133313113311233131212123   >>      C111123313331323113313331323133313231323132322331323133313113311233131212122   >>