#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);
    if(a.size()==0) x=r+11;
    if(b.size()==0) y + r + 10; 
    cout<<x<<' '<<y<<'\n';
}

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