C21221212121211331322132313132313331313232233132332333132313221111   >>    C2122121212121133132213231313231333131323223313233233313231322111   <<    C21221212121211331322132313132313331313232233132332333132313221113   >>      C21221212121211331322132313132313331313232233132332333132313221112   >>