C111123313331323113313331333133313231323133312111111331323112121   >>    C11112331333132311331333133313331323132313331211111133132311212   <<    C111123313331323113313331333133313231323133312111111331323112123   >>      C111123313331323113313331333133313231323133312111111331323112122   >>