#include <bits/stdc++.h>
using namespace std;
void solve() {
int n, m;
cin >> n >> m;
vector<string> a(n, string(m, ' '));
if (n & 1) {
int t = (n + 1) / 2;
for (int i = t; i < n; i++) {
fill(a[i].begin(), a[i].end(), '-');
}
int k = 0;
for (int i = 0; i < (n + 1) / 2; i++) {
fill(a[i].begin(), a[i].end(), '+');
for (int j = k; j < m; j += t) {
a[i][j] = '-';
}
k++;
}
} else {
for (int i = n / 2 - 1; i < n; i++) {
fill(a[i].begin(), a[i].end(), '-');
}
int t = n / 2 + 1;
int k = 0;
for (int i = 0; i < n / 2 - 1; i++) {
fill(a[i].begin(), a[i].end(), '-');
for (int j = k; j < k + t; j++) {
a[i][j] = '+';
}
k++;
}
}
int cnt = 0;
for (int i = 0; i < n; i++) {
int red = 0, blue = 0;
for (int j = 0; j < m; j++) {
if (a[i][j] == '+') {
red++;
} else {
blue++;
}
}
cnt += red > blue;
}
for (int j = 0; j < m; j++) {
int red = 0, blue = 0;
for (int i = 0; i < n; i++) {
if (a[i][j] == '+') {
red++;
} else {
blue++;
}
}
cnt += blue > red;
}
cout << cnt << '\n';
for (auto s : a) {
cout << s << '\n';
}
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t;
cin >> t;
while (t--) {
solve();
}
return 0;
}
