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 √ | D 42 √ | D 43 √ | D 44 √ | D 45 √ | D 46 √ | D 47 √ | D 48 √ | D 49 √ | D 50 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 √ | D 39 √ | D 38 √ | D 37 √ | D 36 | D 35 | D 34 | D 33 | D 32 | D 31 |
| D 41 √ | D 42 √ | D 43 √ | D 44 √ | D 45 √ | D 46 √ | D 47 √ | D 48 √ | D 49 √ | D 50 O |
| Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | Majority→ | D 51 O |
| R 41 O | R 42 + | R 43 + | D 57 + | D 56 + | D 55 O | D 54 O | D 53 O | D 52 O | D 51 O |
| R 40 O | R 39 O | 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:
What is the D48 when the D 50 O is d 31?
Answer:
D 33