C111123313331323113313331333133313331323131211113313133313233311   >>    C11112331333132311331333133313331333132313121111331313331323331   <<    C111123313331323113313331333133313331323131211113313133313233313   >>      C111123313331323113313331333133313331323131211113313133313233312   >>