#include <stdio.h>
#include <string.h>

int main() {
    int T;
    scanf("%d", &T);
    getchar();

    while (T--) {
        char grid[27][27];
        int row=-1, column, i,j,m,n,k,ans=0,area=0,area1=0,flag;
        while (gets(grid[++row])) {
            if (grid[row][0] == '\0') break;
        }
        column = strlen(grid[0]);

        for (i = 0;i<row; i++) {
            for (j = 0;j<column;j++) {
                for (k=j;k<column;k++) {
                    flag = 1;
                    area=0;
                    for (n = i;n<row && flag;n++) {
                        area1 = 0;
                        for (m=j;m<=k && flag;m++) {
                            if (grid[n][m] == '0') flag = 0;
                            else area1++;
                        }
                        if (flag) area += area1;
                    }
                    if (area > ans) ans = area;
                }

            }
        }
        printf("%d\n", ans);
	if (T>0) printf("\n");
    }

    return 0;
}