#include<bits/stdc++.h>
using namespace std;
#define ll long long int 
int main()
{
    ll tc;
    cin>>tc;
    while(tc--)
    {
        ll n,m;
        cin>>n>>m;
        char ar[n][m];
        for(int i=0;i<n;i++)
        {
            for(int j=0;j<m;j++)
            {
                cin>>ar[i][j];
            }
        }
        ll mx=0;
        for(int i=0;i<n;i++)
        {
            for(int j=0;j<m;j++)
            {
                if(ar[i][j]=='+')
                {
                    ll c=1;
                    ll l=i-1;
                    ll r=j;
                    while(l>=0)
                    {
                        if(ar[l][r]=='+')
                            c++;
                        else
                            break;
                        l--;
                    }
                    l=i+1;
                    r=j;
                    while(l<n)
                    {
                        if(ar[l][r]=='+')
                            c++;
                        else
                            break;
                        l++;
                    }
                    l=i;
                    r=j-1;
                    while(r>=0)
                    {
                        if(ar[l][r]=='+')
                            c++;
                        else
                            break;
                        r--;
                    }
                    l=i;
                    r=j+1;
                    while(r<m)
                    {
                        if(ar[l][r]=='+')
                            c++;
                        else
                            break;
                        r++;
                    }
                    mx=max(mx,c);
                }
            }
        }
        cout<<mx<<endl;
    }
}