C21221212121211331322132313132313331313233313232213232233131323221   >>    C2122121212121133132213231313231333131323331323221323223313132322   <<    C21221212121211331322132313132313331313233313232213232233131323223   >>      C21221212121211331322132313132313331313233313232213232233131323222   >>