#include "bits/stdc++.h"
// @JASPER'S BOILERPLATE
using namespace std;
using ll = long long;
#ifdef JASPER
#include "debug.h"
#else
#define debug(...) 166
#endif
signed main() {
cin.tie(0) -> sync_with_stdio(0);
#ifdef JASPER
freopen("in1", "r", stdin);
#endif
int T;
cin >> T;
while (T--) {
int n, m;
cin >> n >> m;
int sz = (n * m);
int opt = -1;
int ans = 0;
for (int msk = 0; msk < (1 << sz); ++msk) {
vector <vector <int>> a(n, vector <int> (m));
for (int i = 0; i < sz; ++i) {
if (msk & (1 << i)) {
int r = i / m;
int c = i % m;
a[r][c] = 1;
}
}
int A = 0, B = 0;
for (int i = 0; i < n; ++i) {
int r = 0, b = 0;
for (int j = 0; j < m; ++j) {
if (a[i][j]) ++r;
else ++b;
}
if (r > b) ++A;
}
for (int j = 0; j < m; ++j) {
int r = 0, b = 0;
for (int i = 0; i < n; ++i) {
if (a[i][j]) ++r;
else ++b;
}
if (b > r) ++B;
}
// debug(A, B, msk);
if (A + B > ans) {
ans = A + B;
opt = msk;
}
}
vector <vector <int>> a(n, vector <int> (m));
for (int i = 0; i < sz; ++i) {
if (opt & (1 << i)) {
int r = i / m;
int c = i % m;
a[r][c] = 1;
}
}
cout << ans << "\n";
for (int i = 0; i < n; ++i) {
for (int j = 0; j < m; ++j) {
cout << (a[i][j]? "+" : "-");
}
cout << "\n";
}
}
return 0;
}
