C12313211232233312111111312111133133313331333112331311311213223323311   >>    C1231321123223331211111131211113313331333133311233131131121322332331   <<    C12313211232233312111111312111133133313331333112331311311213223323313   >>      C12313211232233312111111312111133133313331333112331311311213223323312   >>