C12313211232233312111111312111133133313331333112331311311213232131   >>    C1231321123223331211111131211113313331333133311233131131121323213   <<    C12313211232233312111111312111133133313331333112331311311213232133   >>      C12313211232233312111111312111133133313331333112331311311213232132   >>