C12313211232233312111111312111133133313331333112331311311213321312232211   >>    C1231321123223331211111131211113313331333133311233131131121332131223221   <<    C12313211232233312111111312111133133313331333112331311311213321312232213   >>      C12313211232233312111111312111133133313331333112331311311213321312232212   >>