public static void main(String[] args) {

Scanner inp = new Scanner(System.in);

int t = inp.nextInt();

for(int x = 1; x <= t; x++){

int n = inp.nextInt(), m = inp.nextInt();

int[][] a = new int[20][20];

int[][] b = new int[20][20];

int[][] c = new int[20][20];

for(int i = 0; i < n; i++){

for(int j = 0; j < m; j++){

a[i][j] = inp.nextInt();

}

}

for(int i = 0;i < m; i++){

for(int j = 0;j < n; j++){

b[i][j] = a[j][i];

}

}

for(int i = 0;i < n; i++){

for(int j = 0; j < n; j++){

c[i][j] = 0;

for(int k = 0;k < m; k++){

c[i][j] = c[i][j] + a[i][k] * b[k][j];

}

}

}

System.out.printf("Test %d:\n", x);

for(int i=0;i<n;i++){

for(int j=0;j<n;j++){

System.out.printf("%d ", c[i][j]);

}

System.out.printf("\n");

}

}

}