#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
const int N = 1e3;
int t, n, m, x, ans, r[N], c[N];
char a[2][N][N];
string b[3];
int f() {
for (int i = 0; i < n; i++) {
r[i] = 0;
}
for (int i = 0; i < m; i++) {
c[i] = 0;
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
if (a[1][i][j] == '+') r[i]++;
else c[j]++;
}
}
int y = 0;
for (int i = 0; i < n; i++) {
y += (r[i] > m/2);
}
for (int i = 0; i < m; i++) {
y += (c[i] > n/2);
}
return y;
}
signed main() {
ios::sync_with_stdio(false); cin.tie(nullptr);
cin >> t;
while (t--) {
cin >> n >> m;
ans = 0;
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
a[1][i][j] = '+';
}
}
vector<int> cnt(n, m);
for (int j = 0; j < m; j++) {
vector<pair<int, int>> pos;
for (int i = 0; i < n; i++) {
pos.push_back(make_pair(-cnt[i], i));
}
sort(all(pos));
for (int i = 0; i <= n/2; i++) {
int y = -pos[i].first;
if (y-1 <= m/2) continue;
cnt[pos[i].second]--;
a[1][pos[i].second][j] = '-';
}
}
x = f();
if (x > ans) {
ans = x;
swap(a[0], a[1]);
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
a[1][i][j] = '-';
}
}
//vector<int> cnt;
cnt.clear();
cnt.resize(m, n);
for (int i = 0; i < n; i++) {
vector<pair<int, int>> pos;
for (int j = 0; j < m; j++) {
pos.push_back(make_pair(-cnt[j], j));
}
sort(all(pos));
for (int j = 0; j <= m/2; j++) {
int y = -pos[j].first;
if (y-1 <= n/2) continue;
cnt[pos[j].second]--;
a[1][i][pos[j].second] = '+';
}
}
x = f();
if (x > ans) {
ans = x;
swap(a[0], a[1]);
}
cout << ans << "\n";
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
cout << a[0][i][j];
}
cout << "\n";
}
}
}
