#include <bits/stdc++.h>
using namespace std;

int main(void){
	string s;cin >> s;

	for(int i=0;i<s.size()-1;i++){
		if(s[i] == s[i+1]){
			cout << i+1 << " " << i+2 << endl;return 0;
		}
		if(i < s.size()-2 && s[i] == s[i+2]){
			cout << i+1 << " " << i+3 << endl;return 0;
		}
	}
	cout << -1 << " " << -1 << endl;
	return 0;
}