#include <bits/stdc++.h>
#define pb push_back
#define ALL(x) x.begin(),x.end()
using namespace std;
int n, m;
const int N = 1e3+1;
bool ans[N][N];
void go() {
bool flip = 0;
cin >> n >> m;
char a = '+', b = '-';
if (n > m) {
flip = 1;
swap(n, m);
}
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++) ans[i][j] = 1;
int changeCnt = m * ((n-1)/2), curLine = 0, curPick = 0;
for (int i = 0; changeCnt>0; i++) {
ans[curLine][i%m] = 0;
changeCnt--, curPick++;
if (curPick*2 > m) {
curLine++;
curPick = 0;
}
}
cout << m + curLine <<'\n';
if (flip) swap(n, m);
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) cout << (flip^(flip?ans[j][i]:ans[i][j])? b:a);
cout << '\n';
}
}
signed main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
// freopen("in.txt", "r", stdin);
// freopen("out.txt", "w", stdout);
int T; cin >> T;
while(T--) go();
}
