C312312111111331312111133133313331333133313231333132212323223311   >>    C31231211111133131211113313331333133313331323133313221232322331   <<    C312312111111331312111133133313331333133313231333132212323223313   >>      C312312111111331312111133133313331333133313231333132212323223312   >>