C21221212121211331322132313132313231313232233132313223313132333132313221321   >>    C2122121212121133132213231313231323131323223313231322331313233313231322132   <<    C21221212121211331322132313132313231313232233132313223313132333132313221323   >>      C21221212121211331322132313132313231313232233132313223313132333132313221322   >>