C111123313331323113313331323133313231333131323132313231323112121   >>    C11112331333132311331333132313331323133313132313231323132311212   <<    C111123313331323113313331323133313231333131323132313231323112123   >>      C111123313331323113313331323133313231333131323132313231323112122   >>