C21221212121211331322132313132313231313232233132313223313231323212221   >>    C2122121212121133132213231313231323131323223313231322331323132321222   <<    C21221212121211331322132313132313231313232233132313223313231323212223   >>      C21221212121211331322132313132313231313232233132313223313231323212222   >>