C111123313331323113313331333133313231323133312111133131121211211   >>    C11112331333132311331333133313331323132313331211113313112121121   <<    C111123313331323113313331333133313231323133312111133131121211213   >>      C111123313331323113313331333133313231323133312111133131121211212   >>