C21221212121211331322132313132313231313232233132313223313231333133313221321   >>    C2122121212121133132213231313231323131323223313231322331323133313331322132   <<    C21221212121211331322132313132313231313232233132313223313231333133313221323   >>      C21221212121211331322132313132313231313232233132313223313231333133313221322   >>