C111123313331323113313331333133313331323132311233133313231323121   >>    C11112331333132311331333133313331333132313231123313331323132312   <<    C111123313331323113313331333133313331323132311233133313231323123   >>      C111123313331323113313331333133313331323132311233133313231323122   >>