C21221212121211331322132313132313231313232233132313223313231213231   >>    C2122121212121133132213231313231323131323223313231322331323121323   <<    C21221212121211331322132313132313231313232233132313223313231213233   >>      C21221212121211331322132313132313231313232233132313223313231213232   >>