C12313211232233312111111312111133133313331323133322233121322313221   >>    C1231321123223331211111131211113313331333132313332223312132231322   <<    C12313211232233312111111312111133133313331323133322233121322313223   >>      C12313211232233312111111312111133133313331323133322233121322313222   >>