C111123313331323113313331333133313231323133312111133131333132311313231111   >>    C11112331333132311331333133313331323132313331211113313133313231131323111   <<    C111123313331323113313331333133313231323133312111133131333132311313231113   >>      C111123313331323113313331333133313231323133312111133131333132311313231112   >>