C111123313331323113313331333133313331323132333133313211231313121   >>    C11112331333132311331333133313331333132313233313331321123131312   <<    C111123313331323113313331333133313331323132333133313211231313123   >>      C111123313331323113313331333133313331323132333133313211231313122   >>