C12313211232233312111111312111133133313331323133323132213233232133213221   >>    C1231321123223331211111131211113313331333132313332313221323323213321322   <<    C12313211232233312111111312111133133313331323133323132213233232133213223   >>      C12313211232233312111111312111133133313331323133323132213233232133213222   >>