C12313211232233312111111312111133133313331323133311233111321131223311   >>    C1231321123223331211111131211113313331333132313331123311132113122331   <<    C12313211232233312111111312111133133313331323133311233111321131223313   >>      C12313211232233312111111312111133133313331323133311233111321131223312   >>