C21221212121211331322132313132313132313232233132313223313233313231311231   >>    C2122121212121133132213231313231313231323223313231322331323331323131123   <<    C21221212121211331322132313132313132313232233132313223313233313231311233   >>      C21221212121211331322132313132313132313232233132313223313233313231311232   >>