C111123313331323113313331333133313331122112312111112111112111113331333223311   >>    C11112331333132311331333133313331333112211231211111211111211111333133322331   <<    C111123313331323113313331333133313331122112312111112111112111113331333223313   >>      C111123313331323113313331333133313331122112312111112111112111113331333223312   >>