#include <cstdio>
#include <stdio.h>
#include <stdbool.h>
#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
#include <cassert>
using namespace std;
#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second
int32_t main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int t;
cin>>t;
while (t--){
int n, m;
cin>>n>>m;
if (n<m){
cout<<max(m, n)+(min(m, n)-1)/2<<"\n";
for (int i=0; i<n; ++i){
for (int j=0; j<m; ++j){
if (i<n/2&&j<=m/2)cout<<'+';
else cout<<'-';
}
cout<<"\n";
}
}
else{
cout<<max(m, n)+(min(m, n)-1)/2<<"\n";
for (int i=0; i<n; ++i){
for (int j=0; j<m; ++j){
if (i<=n/2&&j<m/2)cout<<'-';
else cout<<'+';
}
cout<<"\n";
}
}
}
}
