static void Main(string[] args)
{
using (var prob = new CodeJamProblem('a', ProblemType.Large, 0))
{
int tcase = prob.ReadLineInt32();
for (int cases = 0; cases < tcase; cases++)
{
int[] a = prob.ReadInt32Array();
int r = a[0];
int c = a[1];
string[] ss = prob.ReadLines(r);
char[,] s = new char[r, c];
for (int i = 0; i < r; i++)
{
for (int j = 0; j < c; j++)
{
s[i, j] = ss[i][j];
}
}
bool ok = true;
for (int i = 0; i < r; i++)
{
for (int j = 0; j < c; j++)
{
if (s[i, j] == '#')
{
if (i == r - 1 || j == c - 1)
{
ok = false;
break;
}
if (s[i + 1, j] != '#' || s[i, j + 1] != '#' || s[i + 1, j + 1] != '#')
{
ok = false;
break;
}
s[i, j] = '/';
s[i, j + 1] = '\\';
s[i + 1, j] = '\\';
s[i + 1, j + 1] = '/';
}
if (!ok)
{
break;
}
}
if (!ok)
{
break;
}
}
prob.OutputCase();
if (!ok)
{
prob.WriteLine("Impossible");
}
else
{
for (int i = 0; i < r; i++)
{
string ans = "";
for (int k = 0; k < c; k++)
{
ans += s[i, k];
}
prob.WriteLine(ans);
}
}
}
}
}
static void Main(string[] args)
{
using (var prob = new CodeJamProblem('a', ProblemType.Large, 1))
{
var t = prob.ReadLineInt32();
for (int c = 0; c < t; c++)
{
var info1 = prob.ReadInt32Array();
var n = info1[0];
var k = info1[1];
var board = prob.ReadLines(n).Select(s => s.Select(ch => ".RB".IndexOf(ch)).ToArray()).ToArray();
for (int i = 0; i < board.Length; i++)
{
for (int r = 0; r < board[i].Length - 1; r++)
{
for (int j = board[i].Length - 1; j >= 1; j--)
{
if (board[i][j] == 0)
{
board[i][j] = board[i][j - 1];
board[i][j - 1] = 0;
}
}
}
}
var red = false;
var blue = false;
for (int i = 0; i < board.Length; i++)
{
for (int j = 0; j < board[i].Length; j++)
{
var p = board[i][j];
if (p == 0)
{
continue;
}
var hl = true;
var vl = true;
var dll = true;
var drl = true;
for (int x = 1; x < k; x++)
{
if (j <= board[i].Length - k)
{
if (board[i][j + x] != p)
{
hl = false;
}
}
else
{
hl = false;
}
if (i >= k - 1 && j <= board[i].Length - k)
{
if (board[i - x][j + x] != p)
{
dll = false;
}
}
else
{
dll = false;
}
if (i <= board.Length - k)
{
if (board[i + x][j] != p)
{
vl = false;
}
}
else
{
vl = false;
}
if (i <= board.Length - k && j <= board[i].Length - k)
{
if (board[i + x][j + x] != p)
{
drl = false;
}
}
else
{
drl = false;
}
}
var hasLine = hl || vl || dll || drl;
if (p == 1)
{
red |= hasLine;
}
else if (p == 2)
{
blue |= hasLine;
}
}
}
if (red && blue)
{
prob.OutputCase("Both");
}
else if (red)
{
prob.OutputCase("Red");
}
else if (blue)
{
prob.OutputCase("Blue");
}
else
{
prob.OutputCase("Neither");
}
}
}
}