#include<stdio.h>
int main(){
int t,n,m;
scanf("%d",&t);
while(t--){
    scanf("%d%d",&n,&m);
    int i,j,k,Count=0;
    char arr[n][m];
    for(i=0;i<n;i++){
 
        scanf("%s",&arr[i]);
 
    }
    for(i=0;i<n-1;i++){
        for(j=0;j<m-1;j++){
            for(k=j+1;k<m;k++){
                if((arr[i][j]==arr[i][k])&&(arr[i][k]==arr[k-j+i][k])&&(arr[k-j+i][k]==arr[k-j+i][j]))
                    Count++;
            }
        }
    }
    printf("%d\n",Count);
 
}
return 0;
}
 

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2 2
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3 3
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4 4
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