#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <queue>
#include <map>
#include <set>
#include <cmath>
#include <numeric>
#include <iomanip>
#include <stack>
#include <complex>
#include <functional>
#include <tuple>

using namespace std;

#define Rep(i,a,b) for(ll i = a; i < b; ++i)
#define rep(i,b) Rep(i,0,b)
#define allof(a) (a).begin(), (a).end()

#define Yes(q) ((q) ? "Yes" : "No")
#define YES(q) ((q) ? "YES" : "NO")
#define Possible(q) ((q) ? "Possible" : "Impossible")
#define POSSIBLE(q) ((q) ? "POSSIBLE" : "IMPOSSIBLE")

using ll = long long;

constexpr int inf = 1e9 + 7;
constexpr ll infll = 1ll << 60ll;
constexpr ll mod = 1e9 + 7;
// 0~3までは右左下上 4~7までは斜め
constexpr int dx[] = { 1, 0, -1, 0, 1, 1, -1, -1 };
constexpr int dy[] = { 0, -1, 0, 1, 1, -1, -1, 1 };

namespace {
    template<typename T> bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
    template<typename T> bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }

    void Cout(long long x, const char* end = "\n") { std::cout << x << end; }
    template <typename T> void Cout(const T& x, const char* end = "\n") { std::cout << x << end; }
    template <typename T> void Cout(const std::vector<T>& x, const char* sep = " ", const char* end = "\n") { for (std::size_t i = 0, sz = x.size(); i < sz; ++i) { std::cout << x[i] << (i == sz - 1 ? end : sep); } }

    // 標準入出力
    struct inp {
        std::size_t szi, szj;
        inp(std::size_t _szi = 1, std::size_t _szj = 1) : szi(_szi), szj(_szj) {}
        template <typename T> operator T () const { T a; std::cin >> a; return a; }
        template <typename T> operator std::vector<T>() const { std::vector<T> a(szi); for (std::size_t i = 0; i < szi; ++i) std::cin >> a[i]; return a; }
        template <typename T> operator std::vector<std::vector<T>>() const {
            std::vector<std::vector<T>> a(szi, std::vector<T>(szj));
            for (std::size_t i = 0; i < szi; ++i) for (std::size_t j = 0; j < szj; ++j) cin >> a[i][j]; return a;
        }
    };
    inp inp1;
}

int main() {

    string s = inp1;
    int n = s.length();

    // 文字の距離をとるだけでよい
    vector<vector<int>> pos(26, vector<int>());
    rep(i, n) {
        pos[(s[i] - 'a')].emplace_back(i);
    }

    int a, b;
    a = b = -1;
    rep(i, 26) {
        int sz = pos[i].size();
        rep(j, sz - 1) {
            if (pos[i][j + 1] - pos[i][j] <= 2) {
                a = pos[i][j] + 1;
                b = pos[i][j + 1] + 1;
                i = 26;
                break;
            }
        }
    }

    cout << a << " " << b << endl;

    return 0;
}

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

int main() {
  string s;
  cin >> s;
  int n = s.size();
  for (int i=0; i<n-1; i++) {
    if (s[i] == s[i+1]) {
      cout << i+1 << ' ' << i+2 << endl;
      return 0;
    }
  }
  for (int i=0; i<n-2; i++) {
    if (s[i] == s[i+2]) {
      cout << i+1 << ' ' << i+3 << endl;
      return 0;
    }
  }
  cout << -1 << ' ' << -1 << endl;
  return 0;
}
