Please solve the programming task below using a self-contained code snippet in a markdown code block.

Return the number of distinct non-empty substrings of text that can be written as the concatenation of some string with itself (i.e. it can be written as a + a where a is some string).
 
Please complete the following python code precisely:
```python
class Solution:
    def distinctEchoSubstrings(self, text: str) -> int:
```