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:
| Rank | Belt Alternate 1 | Belt Alternate 2 | Belt Alternate 3 | Belt Alternate 4 |
| --- | --- | --- | --- | --- |
| 10th kyū | White belt |  |  |  |
| 9th kyū | Red belt | White belt | White belt | White belt |
| 8th kyū | Yellow belt | White belt | Yellow belt | Yellow belt |
| 7th kyū | Orange belt | White belt | Orange belt | Orange belt |
| 6th kyū | Green belt | Green belt | Blue belt | Green belt |
| 5th kyū | Blue belt | Blue belt | Purple belt | Blue belt |
| 4th kyū | Purple belt | Purple belt | Green Belt | Blue belt |
| 3rd kyū | Brown belt | Brown belt | Brown belt | Brown belt |
| 2nd kyū | Brown-White belt | Brown belt | Brown belt | Brown belt |
| 1st kyū | Brown-Black belt | Brown belt | Brown belt | Brown belt |
| 1st–8th dan | Black belt | Black belt | Black belt | Black belt |
Question:
which kyu levels have only one color belt?
Answer:
10th kyū