C12313211232233312111111312111133133313331333112331311311213313213221231   >>    C1231321123223331211111131211113313331333133311233131131121331321322123   <<    C12313211232233312111111312111133133313331333112331311311213313213221233   >>      C12313211232233312111111312111133133313331333112331311311213313213221232   >>