#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif
#define ll long long
#define ld long double
#define inf 0x3f3f3f3f3f3f3f3f
#define pii pair<int,int>
#define all(x) (x).begin(), (x).end()
#define isz(x) (int)(x.size())
const int MXN = 1020;
const ll mod = 998244353;
const char r = '-', b = '+';
char a[MXN][MXN];
void Solve(int tc) {
int n, m;
cin >> n >> m;
int answ = 0;
if (n < m) {
answ += m;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++) a[i][j] = r;
int s = n - (n / 2 + 1);
answ += s;
for (int i = 1; i <= s; i++)
for (int j = 1; j <= m; j++)
a[i][j] = b;
} else {
answ += n;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++) a[i][j] = b;
int s = m - (m / 2 + 1);
answ += s;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= s; j++)
a[i][j] = r;
}
cout << answ << '\n';
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++)
cout << a[i][j];
cout << '\n';
}
return;
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
#ifdef LOCAL
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
freopen("err.log", "w", stderr);
#endif
int t = 1;
cin >> t;
for (int tt = 1; tt <= t; ++tt) Solve(tt);
return 0;
}
