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

int main() {
  string s;
  cin>>s;
  int n = s.length();

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