EDU_ROUND_113

#include<bits/stdc++.h>
using namespace std;
int balString(string str)
{
	int counta=0,countb=0,flag=0,temp,temp1;
	for(int i=0;i<str.size();i++)
	{
		counta=0;
		countb=0;
		for(int j=i;j<str.size();j++)
		{
			if(str[j]=='a')
			{
				counta++;
			}
			else
			if(str[j]=='b')
			{
				countb++;
			}
			if(counta==countb)
			{
				temp=i;
				temp1=j;
				flag=1;
				break;
			}
		}
		if(flag==1)
		break;
	}
	if(flag==0)
	{
		cout<<"-1"<<" "<<"-1"<<endl;
	}
	else
	{
		cout<<temp+1<<" "<<temp1+1<<endl;
	}
	return 0;
}
int main() {
	int t;
	cin>>t;
	while(t--)
	{
		int n;
		cin>>n;
		string s;
		cin>>s;
		balString(s);
	}
	return 0;
}