/** @kutbilimone **/ #include <bits/stdc++.h> using namespace std; #define endl '\n' signed main(){ ios_base::sync_with_stdio(false); cin.tie(nullptr); int t; cin >> t; while(t--){ int n, m; cin >> n >> m; if(n > m){ cout << n+(m-m/2-1) << endl; string res = string(m/2+1, '+') + string(m-m/2-1, '-'); for(int i = 0; i < n; i++) cout << res << endl; }else{ string res1(m, '+'), res2(m, '-'); int i; cout << m+(n-n/2-1) << endl; for(i = 0; i < n/2+1; i++) cout << res2 << endl; for(; i < n; i++) cout << res1 << endl; } } return 0; }