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- #include<bits\stdc++.h>
- using namespace std;
- int main()
- {
- int t;
- scanf("%d", &t);
- while(t--)
- {
- int n, flag, j;
- scanf("%d", &n);
- string s;
- cin >> s;
- flag = 0;
- for(j = 0; j < n; j++)
- {
- if((s[j] == 'a' && s[j+1] == 'b') || (s[j] == 'b' && s[j+1] == 'a') )
- {
- printf("%d %d\n", j+1, j+2);
- flag = 1;
- break;
- }
- }
- if(flag == 0) printf("-1 -1\n");
- }
- }
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