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

typedef long long ll; typedef long double ld;

void solve() { //std::cout.setf(std::ios::fixed); //std::cout.precision(4); string s; getline(cin, s);

queue<int> st;

for (int i = 0; i < s.length(); i++)
    if (s[i] == ' ')
        st.push(i);

if (st.empty())
    cout << -1 << endl;
else
    cout << st.front() << " " << st.back() << endl;

}

int main() { iosbase::syncwith_stdio(false), cin.tie(NULL), cout.tie(NULL);

ifdef _DEBUG

freopen("input-1.txt", "r", stdin);
//freopen("output-1.txt", "w", stdout);

endif

solve();
//int t; cin >> t; while(t--) solve();

return 0;

}