Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Number | Arrangement | Year, Builder | Number | Arrangement | Year, Builder | Number | Model | Year, Builder |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Governor Markham | 2-4-2T | 1891, Baldwin | Number 7 | 0-6-0 | 1914, Alco-Brooks | Number 20 | S2 | Alco |
| Number 2 | 0-4-2T | 1901, Baldwin | Number 8 | 0-6-0 | 1916 | Number 21 | S2 | Alco |
| Number 3 | 0-4-2T | 1904, Baldwin | Number 9 | 0-6-0 | 1920, Alco-Brooks | Number 22 | S2 | 1944, Alco |
| Number 4 |  |  | Number 10 | 0-6-0 | 1923, Baldwin | Number 23 | S2 | 1944, Alco |
| Number 5 |  |  | Number 11 | 0-6-0 | 1927 | Number 24 | S2 | 1945, Alco |
| Number 6 | 0-6-0 | 1913, Baldwin | Number 12 |  |  | Number 25 | S2 | Alco |
Question:
how many trains on this graph do not mention alco or alco-brooks as its builder?
Answer:
10