C111123313331323113313331333133313331122112312111112111112111113331322323311   >>    C11112331333132311331333133313331333112211231211111211111211111333132232331   <<    C111123313331323113313331333133313331122112312111112111112111113331322323313   >>      C111123313331323113313331333133313331122112312111112111112111113331322323312   >>