C21221212121211331322132313132313231313232233132313223313231333132221221   >>    C2122121212121133132213231313231323131323223313231322331323133313222122   <<    C21221212121211331322132313132313231313232233132313223313231333132221223   >>      C21221212121211331322132313132313231313232233132313223313231333132221222   >>