C12313211232233312111111312111133133313331333113113332131223231   >>    C1231321123223331211111131211113313331333133311311333213122323   <<    C12313211232233312111111312111133133313331333113113332131223233   >>      C12313211232233312111111312111133133313331333113113332131223232   >>