C12313211232233312111111312111133133313331333132232233122322112113111221   >>    C1231321123223331211111131211113313331333133313223223312232211211311122   <<    C12313211232233312111111312111133133313331333132232233122322112113111223   >>      C12313211232233312111111312111133133313331333132232233122322112113111222   >>