C111123313331323113313331333133313231333132311312111133131121113232321   >>    C11112331333132311331333133313331323133313231131211113313112111323232   <<    C111123313331323113313331333133313231333132311312111133131121113232323   >>      C111123313331323113313331333133313231333132311312111133131121113232322   >>