Google | Distinct Echo Substrings

from collections import defaultdict
class Solution:
    def distinctEchoSubstrings(self, text: str) -> int:
        n=len(text)
        ans=defaultdict(int)
        for spl in range(1,n):
            left=spl-1
            right=spl
            while left>-1 and right<n:
                if text[left:spl]==text[spl:right+1]:
                    ans[text[left:spl]]+=1
                left-=1
                right+=1
        # print(n)        
        return len(ans)