#include <iostream>
#include <vector>
using namespace std;
int calc(vector<vector<char>> &grid) {
int n = grid.size();
int m = grid[0].size();
int a = 0, b = 0;
for (int i = 0; i < n; ++i) {
int plus = 0, minus = 0;
for (int j = 0; j < m; ++j) {
if (grid[i][j] == '+') ++plus;
else ++minus;
}
if (plus > minus) ++a;
}
for (int j = 0; j < m; ++j) {
int plus = 0, minus = 0;
for (int i = 0; i < n; ++i) {
if (grid[i][j] == '+') ++plus;
else ++minus;
}
if (minus > plus) ++b;
}
return a + b;
}
void _() {
int n, m;
cin >> n >> m;
int total = 1 << (n * m);
vector<vector<char>> grid(n, vector<char>(m));
int best = 0, mx = 0;
for (int mask = 0; mask < total; ++mask) {
for (int j = 0; j < n * m; ++j) {
int r = j / m;
int c = j % m;
if (mask & (1 << j)) grid[r][c] = '-';
else grid[r][c] = '+';
}
int score = calc(grid);
if (score > mx) {
mx = score;
best = mask;
}
}
cout << mx << '\n';
for (int j = 0; j < n * m; ++j) {
int r = j / m;
int c = j % m;
if (best & (1 << j)) grid[r][c] = '+';
else grid[r][c] = '-';
}
for (auto &r : grid) {
for (auto &c : r) cout << c;
cout << '\n';
}
}
int main() {
cin.tie(0)->sync_with_stdio(0);
int tc;
cin >> tc;
while (tc--) _();
}
