C21221212121211331322132313132323323132313231333132313232233111   >>    C2122121212121133132213231313232332313231323133313231323223311   <<    C21221212121211331322132313132323323132313231333132313232233113   >>      C21221212121211331322132313132323323132313231333132313232233112   >>