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

int main (void)
{
  int K, k;
  int p, n, i, j, r;
  float s[501], f[501];
  float pi[501][501];
  float t; 

  FILE *in = fopen ("skating.in", "r"),
    *out = fopen("skating.out", "w");

  fscanf (in, "%d\n", &K);

  for (k = 1; k <= K; k ++)
    {
      fprintf (out, "Data Set %d:\n", k);
      fscanf (in, "%d %d\n", &p, &n);
      for (j = 1; j <= p; j ++) fscanf (in, "%f\n", &f[j]);
      for (i = 1; i <= n; i ++) fscanf (in, "%f\n", &s[i]);
      for (i = 1; i <= n; i ++)
	{
	  r = i;
	  for (j = i+1; j <= n; j ++) if (s[j] < s[r]) r = j;
	  t = s[r]; s[r] = s[i]; s[i] = t;
	}
      for (i = 1; i <= p; i ++)
	{
	  r = i;
	  for (j = i+1; j <= p; j ++) if (f[j] < f[r]) r = j;
	  t = f[r]; f[r] = f[i]; f[i] = t;
	}
      for (i = 0; i <= n; i ++) pi[0][i] = 0.0;
      for (j = 1; j <= p; j ++) pi[j][0] = 100000000.0;
      for (j = 1; j <= p; j ++)
	for (i = 1; i <= n; i ++)
	  {
	    pi[j][i] = 100000000.0;
	    t = s[i] - f[j];
	    if (t < 0) t = t*t*t*t;
	    for (r = 0; r < i; r ++)
	      if (pi[j-1][r] + t < pi[j][i]) pi[j][i] = pi[j-1][r] + t;
	  }
      t = 10000000000.0;
      for (i = 1; i <= n; i ++) if (pi[p][i] < t) t = pi[p][i];
      fprintf (out, "%.2f\n\n", t);
      fscanf (in, "\n");
    }

  fclose (in); fclose (out);  
  return 0;
}