C21221212121211331322132313132313231313232233132313223313132333132322222311   >>    C2122121212121133132213231313231323131323223313231322331313233313232222231   <<    C21221212121211331322132313132313231313232233132313223313132333132322222313   >>      C21221212121211331322132313132313231313232233132313223313132333132322222312   >>