C21221212121211331322132313132313132313232233132313223313232231311   >>    C2122121212121133132213231313231313231323223313231322331323223131   <<    C21221212121211331322132313132313132313232233132313223313232231313   >>      C21221212121211331322132313132313132313232233132313223313232231312   >>