C21221212121211331322132313132313132313232233132313223313231323221123313221111   >>    C2122121212121133132213231313231313231323223313231322331323132322112331322111   <<    C21221212121211331322132313132313132313232233132313223313231323221123313221113   >>      C21221212121211331322132313132313132313232233132313223313231323221123313221112   >>