#include<iostream>
#include<algorithm>
#include<cmath>
#include<iomanip>
#include<map>
using namespace std;
int main() {
  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;
    }
    else if(s[i]==s[i+2]) {
      cout << i+1 << " " << i+3 << endl;
      return 0;
    }
  }
  cout << -1 << " " << -1 << endl;
}
