#include<bits/stdc++.h>
using namespace std;
#define fr first
#define sc second
#define pb push_back
typedef long long ll;
typedef pair<int,int>pii;
const int inf = 0x3f3f3f3f;
const int mod = 1000000007;
const double pi = acos(-1.0);
const ll INF = 0x3f3f3f3f3f3f3f3f;
#define rep(i,x,y) for(auto i=(x);i<=(y);++i)
#define dep(i,x,y) for(auto i=(x);i>=(y);--i)
const int dx[] = { -1,0,1,0 }, dy[] = { 0,1,0,-1 };
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll poww(ll a, ll b) { ll s = 1; while (b) { if (b & 1)s = (s * a) % mod; a = (a * a) % mod; b >>= 1; }return s % mod; }
/*----------------------------------------------------------------------------------------------------------------------*/

const int N = 1e6 + 11;
ll n,m;
char z[15][15];
bool vis[15][15];
bool v[15][15];
vector<pii>ve;

void bfs()
{
    memset(v,0,sizeof(v));
    queue<pii>q;
    q.push({1,1});
    while(q.size())
    {
        auto i=q.front();
        q.pop();
        if(v[i.fr][i.sc]==1)continue;
        v[i.fr][i.sc]=1;
        if(i.fr==n&&i.sc==n)
        {
            m=2;
            return;
        }
        if(z[i.fr+1][i.sc]=='.'&&v[i.fr+1][i.sc]==0)q.push({i.fr+1,i.sc});
        if(z[i.fr][i.sc+1]=='.'&&v[i.fr][i.sc+1]==0)q.push({i.fr,i.sc+1});
    }
}

void dfs(int x,int y)
{
    if(m==2)return;
    if(x==n&&y==n)
    {
        m=max(m,1LL);
        for(auto i:ve)z[i.fr][i.sc]='#';
        bfs();
        for(auto i:ve)z[i.fr][i.sc]='.';
        return;
    }
    ve.pb({x,y});
    vis[x][y]=1;
    if(z[x+1][y]=='.'&&vis[x+1][y]==0)
    {
        dfs(x+1,y);
    }
    if(z[x][y+1]=='.'&&vis[x][y+1]==0)
    {
        dfs(x,y+1);
    }
    ve.pop_back();
    vis[x][y]=0;
}




void solve()
{
    cin>>n;m=0;
    ve.clear();
    rep(i,0,14)rep(j,0,14)z[i][j]='#';
    rep(i,1,n)cin>>(z[i]+1);
    if(z[1][1]=='#'||z[n][n]=='#')
    {
        cout<<0<<endl;
        return;
    }
    memset(vis,0,sizeof(vis));
    dfs(1,1);
    cout<<m<<endl;
}


/*----------------------------------------------------------------------------------------------------------------------*/
int main()
{
    ios::sync_with_stdio(false); cin.tie(0);
    ll T = 1;
    cin >> T;
    while (T--)solve();
    return 0;
}