#include <bits/stdc++.h> using namespace std; int main() { int t; cin>>t; while (t--) { int n,m; cin>>n>>m; if (n==m) { if (n%2) cout<<n/2+n<<"\n"; else cout<<n/2+n-1<<"\n"; for (int i=0; i<n; i++) { for (int j=0; j<m; j++) { if (i<=n/2) cout<<"-"; else cout<<"+"; } cout<<"\n"; } } } return 0; }