#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define vll vector<ll>
#define pll pair<ll,ll>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
template<typename T>
using minpq = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using maxpq = priority_queue<T, vector<T>, less<T>>;
void input(vll&q)
{
for(auto&i:q)cin>>i;
}
void pyn(bool x)
{
cout<<(x?"YES":"NO")<<endl;
}
void pYN(bool x)
{
cout<<(x?"Yes":"No")<<endl;
}
void pAB(bool x)
{
cout<<(x?"Alice":"Bob")<<endl;
}
int count(int n,int m,vector<string> g)
{
int ans=0;
for(int i=0;i<n;i++)
{
map<char,int> cnt;
for(int j=0;j<m;j++)cnt[g[i][j]]++;
ans+=(cnt['+']>cnt['-']);
}
for(int j=0;j<m;j++)
{
map<char,int> cnt;
for(int i=0;i<n;i++)
{
cnt[g[i][j]]++;
}
ans+=(cnt['-']>cnt['+']);
}
return ans;
}
// ll get_ans(ll n,ll m)
pair<ll,vector<string>> get_ans(ll n,ll m)
{
ll r=(m/2)+1; // red in row
ll b=(m-r); // blue in row
ll tb=b*n; // total blue in grid
ll bm=(n/2)+1; // blue req in a single column
// cout<<b<<' '<<tb<<' '<<bm<<endl;
// return (n+min(m,(tb/bm)));
// we can do (n-1) + b +b if n%2==1
vector<string> ans;
string cur(m,'+');
// {
pair<ll,vector<string>> cpr={-100,{}};
ll lvl=n;
ll br=(n/2)+1;
ll len=min(m,((b*(lvl))/br));
// if(tp>cpr.first)
// {
// cout<<b*(n-lvl)<<endl;
// cout<<"Holy "<<lvl<<' '<<tp<<endl;
ans.clear();
for(int j=0;j<m;j++)cur[j]='+';
for(int j=0;j<(m-r);j++)cur[j]='-';
int shift=0;
// cout<<cur<<endl;
// cout<<len<<endl;
// cout<<"Make sure"<<endl;
while((int)(cur.size())>len)
{
cur.pop_back();
}
// cout<<"clear"<<endl;
for(int i=0;i<n;i++)
{
if(len!=0)
{
string tp;
for(int j=0;j<len;j++)tp+=cur[(j+shift)%len];
ans.pb(tp);
// cout<<tp<<endl;
shift-=(m-r);
shift=((shift%len)+len)%len;
}
else{ans.pb("");}
while(ans.back().size()<m)ans.back()+='+';
}
// cout<<endl;
ll tp=count(n,m,ans);
// cout<<"Answer "<<tp<<endl;
if(tp>=cpr.first)
cpr={tp,ans};
// }
// }
return cpr;
// return (n+b);
}
/*
---++++
+++-+--
++++---
-------
-------
-------
ans:10
*/
/*
Playground
--++++
++--++
++++--
------
------
------
ans:9
++++++
++++++
------
------
------
------
ans:8
--++++
--++++
----++
----++
++--++
++--++
ans:8
*/
void solve()
{
// problem with even
ll n,m;
cin>>n>>m;
auto mx=get_ans(n,m);
if(mx>=get_ans(m,n))
{
cout<<mx.first<<endl;
for(auto j:mx.second)
{
cout<<j<<endl;
}
// string cur(m,'+');
// for(int i=0;i<((m-1)/2);i++)
// cur[i]='-';
// cout<<mx_pos(n,m)<<endl;
// for(int i=0;i<n;i++)
// cout<<cur<<endl;
}
else
{
mx=get_ans(m,n);
cout<<mx.first<<endl;
for(int i=0;i<n;i++)
{
for(int j=0;j<m;j++)
{
char c=mx.second[j][i];
cout<<((c=='+')?'-':'+');
}
cout<<endl;
}
}
}
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int t=1;
cin>>t;
while(t--)solve();
}
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