C21221212121211331322132313132313331313233313232213232233131331   >>    C2122121212121133132213231313231333131323331323221323223313133   <<    C21221212121211331322132313132313331313233313232213232233131333   >>      C21221212121211331322132313132313331313233313232213232233131332   >>