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 50 √ | D 49 √ | D 48 √ | D 47 √ | D 46 √ | D 45 √ | D 44 √ | D 43 √ | D 42 √ | D 41 √ |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| D 11 | D 12 | D 13 | D 14 | D 15 | D 16 | D 17 | D 18 | D 19 | D 20 |
| D 30 | D 29 | D 28 | D 27 | D 26 | D 25 | D 24 | D 23 | D 22 | D 21 |
| D 31 | D 32 | D 33 | D 34 | D 35 | D 36 | D 37 | D 38 | D 39 | D 40 |
| D 50 √ | D 49 √ | D 48 √ | D 47 √ | D 46 √ | D 45 √ | D 44 √ | D 43 √ | D 42 √ | D 41 √ |
| D 51 √ | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority |
| D 51 √ | D 52 √ | D 53 √ | D 54 √ | D 55 √ | D 56 √ | D 57 √ | D 58 √ | D 59 √ | D 60 √ |
| R 31 O | R 32 + | D 68 + | D 67 + | D 66 + | D 65 O | D 64 O | D 63 √ | D 62 √ | D 61 √ |
| R 30 √ | R 29 √ | R 28 √ | R 27 √ | R 26 √ | R 25 | R 24 | R 23 | R 22 | R 21 |
| R 11 | R 12 | R 13 | R 14 | R 15 | R 16 | R 17 | R 18 | R 19 | R 20 |
| R 10 | R 9 | R 8 | R 7 | R 6 | R 5 | R 4 | R 3 | R 2 | R 1 |
Question:
What is the D 42 √ number when the D 45 √ is r 16?
Answer:
R 19