C111123313331323113313331333133313231323133312111133131323312321   >>    C11112331333132311331333133313331323132313331211113313132331232   <<    C111123313331323113313331333133313231323133312111133131323312323   >>      C111123313331323113313331333133313231323133312111133131323312322   >>