#include <bits/stdc++.h>
using namespace std;
// #define int ll
#define all(x) x.begin(), x.end()
#define len(x) int(x.length())
#define sz(x) int(x.size())
#define F0R(i, l, r) for (int i = l; i <= r; i++)
#define R0F(i, r, l) for (int i = r; i >= l; i--)
#define each(i, x) for (auto &i : x)
#define rep(x) while (x)
#define vec vector
#define ar array
#define max_el *max_element
#define min_el *min_element
#define prq priority_queue
#define grt greater
#define mset multiset
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define skip continue
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef string str;
const int MXN = 2e5 + 5;
const int MOD = 1e9 + 7;
void solve() {
int N, M;
cin >> N >> M;
// M >= N
auto calculate_for_col = [&]() -> void {
vec<vec<int>> res(N + 5, vec<int> (M + 5));
vec<int> col(M + 5);
// 0 -> -
// 1 -> +
int target1 = (M & 1 ? ((M + 1) >> 1) : ((M + 2) >> 1));
int target2 = (N & 1 ? ((N + 1) >> 1) : ((N + 2) >> 1));
int ans = M;
F0R (i, 1, N) {
vec<ar<int, 2>> tmp;
F0R (j, 1, M)
tmp.pb({col[j], j});
sort(all(tmp));
if (N - tmp[target1 - 1][0] - 1 < target2)
break;
F0R (j, 0, target1 - 1) {
res[i][tmp[j][1]] = 1;
col[tmp[j][1]]++;
}
ans++;
}
cout << ans << '\n';
F0R (i, 1, N) {
F0R (j, 1, M)
cout << (!res[i][j] ? '-' : '+');
cout << '\n';
}
};
// N > M
auto calculate_for_row = [&]() -> void {
vec<vec<int>> res(N + 5, vec<int> (M + 5));
vec<int> row(N + 5);
// 0 -> +
// 1 -> -
int target1 = (N & 1 ? ((N + 1) >> 1) : ((N + 2) >> 1));
int target2 = (M & 1 ? ((M + 1) >> 1) : ((M + 2) >> 1));
int ans = N;
F0R (j, 1, M) {
vec<ar<int, 2>> tmp;
F0R (i, 1, N)
tmp.pb({row[i], i});
sort(all(tmp));
if (M - tmp[target1 - 1][0] - 1 < target2)
break;
F0R (i, 0, target1 - 1) {
res[tmp[i][1]][j] = 1;
row[tmp[i][1]]++;
}
ans++;
}
cout << ans << '\n';
F0R (i, 1, N) {
F0R (j, 1, M)
cout << (!res[i][j] ? '+' : '-');
cout << '\n';
}
};
if (M >= N)
calculate_for_col();
else
calculate_for_row();
return;
}
signed main() {
cin.tie(nullptr)->sync_with_stdio(false);
int T = 1;
cin >> T;
rep (T-- > 0)
solve();
return 0;
}
