C111123313331323113313331333133313331122112312111133131133132313233213113231   >>    C11112331333132311331333133313331333112211231211113313113313231323321311323   <<    C111123313331323113313331333133313331122112312111133131133132313233213113233   >>      C111123313331323113313331333133313331122112312111133131133132313233213113232   >>