C111123313331323113313331333133313331323132333133313211232322311   >>    C11112331333132311331333133313331333132313233313331321123232231   <<    C111123313331323113313331333133313331323132333133313211232322313   >>      C111123313331323113313331333133313331323132333133313211232322312   >>