#include<bits/stdc++.h>
using namespace std;
void solve()
{
int n, m;
cin >> n >> m;
bool ans[n][m];
int sz = max(m + (n + 1) / 2, n + (m + 1) / 2);
int t = (m + (n + 1) / 2 >= n + (m + 1) / 2);
memset(ans, false, sizeof(ans));
if(t == 1)
{
for(int j = 0; j < m; j ++)
for(int i = 0; i < n / 2; i++)
ans[(j % 2 ? i : n - i - 1)][j] = 1;
}
else
{
for(int i = 0; i < n; i ++)
for(int j = 0; j < m / 2 + 1; j++)
ans[i][(i % 2 ? j : m - j - 1)] = 1;
}
cout << sz << endl;
for(int i = 0; i < n; i ++)
{
for(int j = 0; j < m; j ++)
cout << (ans[i][j] ? '+' : '-');
cout << endl;
}
}
int main()
{
int t;
cin >> t;
while(t--)
solve();
return 0;
}
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