A

#include <bits/stdc++.h>

using namespace std;

#define ll     long long
#define _test  int _TEST; cin>>_TEST; while(_TEST--)
#define pb     push_back

int main()
{
    _test
    {
        int n;
        cin>>n;

        string s;
        cin>>s;

        int ans = 0;

        int x = 0;

        vector<int> cnt;
        cnt.pb(0);

        for(int i=0; i<n; )
        {
            if(s[i] == '#')
            {
                i++;
                continue;
            }

            while(i<n && s[i]=='.')
            {
                i++;
                x++;
            }

            cnt.pb(x);
            x = 0;
        }

        sort(cnt.begin(), cnt.end());

        if(cnt.back() < 3)
            cout<<accumulate(cnt.begin(), cnt.end(), 0)<<"\n";
        else
            cout<<2<<"\n";
    }
}