#include <iostream>
using namespace std;
int t;
int main()
{
cin >> t;
while (t--)
{
int m, n;
cin >> m >> n;
if (m == n)
{
if (m & 1)
cout << m + n / 2 << '\n';
else
cout << m + n / 2 - 1 << '\n';
for (int i = 1; i <= m; i++)
{
for (int j = 1; j <= n / 2 + 1; j++)
cout << '+';
for (int j = n / 2 + 2; j <= n; j++)
cout << '-';
cout << '\n';
}
}
else if (n > m) /// mai multe coloane decat randuri
{
int sum = n;
if (m & 1)
sum += m / 2;
else
sum += m / 2 - 1;
cout << sum << '\n';
for (int i = 1; i <= m / 2 + 1; i++)
{
for (int j = 1; j <= n; j++)
cout << '-';
cout << '\n';
}
for(int i = m/2+2 ; i <= m ; i++)
{
for (int j = 1; j <= n; j++)
cout << '+';
cout << '\n';
}
}
else if (m > n) /// mai multe randuri decat coloane
{
int sum = m;
if (n & 1)
sum += n / 2;
else
sum += n / 2 - 1;
cout << sum << '\n';
for (int i = 1; i <= m; i++)
{
for (int j = 1; j <= n / 2 + 1; j++)
cout << '+';
for (int j = n / 2 + 2; j <= n; j++)
cout << '-';
cout << '\n';
}
}
}
return 0;
}
