C12313211232233312111111312111133133313331323133323232322112223313113111   >>    C1231321123223331211111131211113313331333132313332323232211222331311311   <<    C12313211232233312111111312111133133313331323133323232322112223313113113   >>      C12313211232233312111111312111133133313331323133323232322112223313113112   >>