C12313211232233312111111312111133133313331323133322233121322112331331   >>    C1231321123223331211111131211113313331333132313332223312132211233133   <<    C12313211232233312111111312111133133313331323133322233121322112331333   >>      C12313211232233312111111312111133133313331323133322233121322112331332   >>