#include <bits/stdc++.h>
#define SPEED ios::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define mp make_pair
#define mt make_tuple
#define ull unsigned long long
#define ll long long
#define dl long double
#define forn(i, n) for(int i = 0; i < n; i++)
using namespace std;
bool check(int k, int n, int m) {
if (k == 0) return true;
int d = n * k / (m - m / 2 - 1 + k);
if (n * k % (m - m / 2 - 1 + k) != 0) d++;
return d <= (n - n / 2 - 1);
}
void start() {
int n, m;
cin >> n >> m;
int k;
int l = 0, r = max(n, m);
while(l < r) {
int mid = (l + (r - l)) / 2;
if (check(mid, max(n, m), min(n, m)) && !check(mid + 1, max(n, m), min(n, m))) {
k = mid;
break;
}
if (check(mid, max(n, m), min(n, m))) {
l = mid + 1;
}
else {
r = mid;
}
}
int d = 0;
if (k != 0) {
d = max(n, m) * k / (min(m, n) - min(m, n) / 2 - 1 + k);
if (n * k % (m - m / 2 - 1 + k) != 0) d++;
}
char ans[n][m];
int cols[n + 1];
int rows[m + 1];
fill(cols, cols + n + 1, 0);
fill(rows, rows + n + 1, 0);
for(int i = 0; i < n; i++) {
for(int j = 0; j < m; j++) {
if (n > m) {
if (j < m / 2 + 1 - k) {
ans[i][j] = '+';
}
else {
if (cols[i] >= k || rows[j] >= d) {
ans[i][j] = '-';
}
else {
ans[i][j] = '+';
cols[i]++;
rows[j]++;
}
}
}
else {
if (i < n / 2 + 1 - k) {
ans[i][j] = '-';
}
else {
if (cols[i] >= d || rows[j] >= k) {
ans[i][j] = '+';
}
else {
ans[i][j] = '-';
cols[i]++;
rows[j]++;
}
}
}
}
}
cout << k + (min(n, m) - min(n, m) / 2 - 1) + max(n, m) << "\n";
for(int i = 0; i < n; i++) {
for(int j = 0; j < m; j++) {
cout << ans[i][j];
}
cout << "\n";
}
}
int main() {
//SPEED;
int t = 1;
cin >> t;
while(t--) {
start();
}
}
