#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 2e5 + 9;
const int mod = 1e9 + 7;
#define eps 1e-5
#define inf 2e18



void solve()
{
    vector<int> a, b;
    bool ok = true;
    string s;
    int l, r; cin >> l >> r;
    for (int i = l; i <= r; ++i)
    {
        cin >> s;
        if (s[0] == 'F' || s[0] == 'B')
        {
            ok = false;
            if (s == "Fizz") a.push_back(i);
            else if (s == "Buzz") b.push_back(i);
            else a.push_back(i), b.push_back(i);
        }
    }

    if (ok)
    {
        cout << r + 1 << ' ' << r + 2 << '\n';
        return;
    }

    int x = 0, y = 0;
    for (auto& i : a) x = __gcd(x, i);
    for (auto& i : b) y = __gcd(y, i);
    cout << x << ' ' << y << '\n';
}

int main()
{
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int _ = 1; // cin>>_;
    while (_--) solve();
    return 0;
}