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:
| D 41 O | D 42 O | D 43 O | D 44 O | D 45 + | R 55 + | R 54 + | R 53 + | R 52 O | R 51 O |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| D 20 | D 19 | D 18 | D 17 | D 16 | D 15 | D 14 | D 13 | D 12 | D 11 |
| D 21 | D 22 | D 23 | D 24 | D 25 | D 26 | D 27 | D 28 | D 29 | D 30 |
| D 40 O | D 39 √ | D 38 √ | D 37 √ | D 36 √ | D 35 √ | D 34 √ | D 33 √ | D 32 | D 31 |
| D 41 O | D 42 O | D 43 O | D 44 O | D 45 + | R 55 + | R 54 + | R 53 + | R 52 O | R 51 O |
| Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | R 51 O |
| R 41 √ | R 42 √ | R 43 √ | R 44 √ | R 45 √ | R 46 √ | R 47 O | R 48 O | R 49 O | R 50 O |
| R 40 √ | R 39 √ | R 38 √ | R 37 √ | R 36 √ | R 35 √ | R 34 | R 33 | R 32 | R 31 |
| R 21 | R 22 | R 23 | R 24 | R 25 | R 26 | R 27 | R 28 | R 29 | R 30 |
| R 20 | R 19 | R 18 | R 17 | R 16 | R 15 | R 14 | R 13 | R 12 | R 11 |
| R 1 | R 2 | R 3 | R 4 | R 5 | R 6 | R 7 | R 8 | R 9 | R 10 |
Question:
Which R 51 O value corresponds to a D 42 O value of r 19?
Answer:
R 11