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:
| # | Original title | Directed by | Written by | Original airdate | Prod. code |
| --- | --- | --- | --- | --- | --- |
| 2–1 | "Back & Bad" | Delyth Thomas | Mary Morris | 10July2003 | 2.1 |
| 2–2 | "Bedsit" | Joss Agnew | Laura Summers | 10July2003 | 2.2 |
| 2–3 | "Brothers" | Joss Agnew | Ian Carney | 17July2003 | 2.3 |
| 2–4 | "Action Therapy" | Delyth Thomas | Gary Parker | 17July2003 | 2.4 |
| 2–5 | "Alien" | Joss Agnew | Rob Gittins | 24July2003 | 2.5 |
| 2–6 | "Doggie" | Delyth Thomas | Tracy Brabin | 24July2003 | 2.6 |
| 2–7 | "Bad Girls" | Delyth Thomas | Othniel Smith | 31July2003 | 2.7 |
| 2–8 | "Big Fight" | Delyth Thomas | Andy Walker | 31July2003 | 2.8 |
| 2–9 | "Hollywood" | Joss Agnew | Sam Bain & Jesse Armstrong | 7August2003 | 2.9 |
| 2–10 | "Home Truths" | Delyth Thomas | Mary Morris | 7August2003 | 2.10 |
| 2–11 | "Day Trip" | Joss Agnew | Gary Parker | 14August2003 | 2.11 |
| 2–12 | "Christmas" | Delyth Thomas | Laura Summers | 14August2003 | 2.12 |
| 2–13 | "Takeover" | Delyth Thomas | Sam Bain & Jesse Armstrong | 21August2003 | 2.13 |
| 2–14 | "Work" | Joss Agnew | Lucy Flannery | 21August2003 | 2.14 |
| 2–15 | "Bridesmaid" | Joss Agnew | Mary Morris | 28August2003 | 2.15 |
| 2–16 | "Quiz" | Delyth Thomas | Rob Gittins & Gary Parker | 28August2003 | 2.16 |
| 2–17 | "Two-Timing Adele" | Delyth Thomas | Abigail Abben Mensah | 4September2003 | 2.17 |
| 2–18 | "Secrets and Lies" | Joss Agnew | Othniel Smith | 4September2003 | 2.18 |
| 2–19 | "Music" | Joss Agnew | Laura Summers | 11September2003 | 2.19 |
| 2–20 | "Family Tree" | Delyth Thomas | Andy Walker | 11September2003 | 2.20 |
| 2–21 | "Ben's Party" | Joss Agnew | Laura Summers | 17September2003 | 2.21 |
| 2–22 | "Get Lost" | Joss Agnew | Mary Morris | 17September2003 | 2.22 |
| 2–23 | "The Long Goodbye" | Delyth Thomas | Othniel Smith | 24September2003 | 2.23 |
| 2–24 | "Genius at Work" | Delyth Thomas | Othniel Smith | 24September2003 | 2.24 |
| 2–25 | "Nathan's Assessment" | Delyth Thomas | Laura Summers | 1October2003 | 2.25 |
Question:
How many numbers have the product code of 2.6?
Answer:
2–6