#include <bits/stdc++.h> using namespace std; typedef int64_t llo; #define mp make_pair #define pb push_back #define a first #define b second int n,m,t; int main(){ ios_base::sync_with_stdio(false); cin.tie(NULL); cin>>t; while(t--){ cin>>n>>m; if(n%2==1 and m%2==1){ if(n>m){ cout<<n+(m/2)<<endl; for(int i=0;i<n;i++){ for(int j=0;j<m;j++){ if(j%2==0){ cout<<"+"; } else{ cout<<"-"; } } cout<<endl; } } else{ cout<<m+(n/2)<<endl; for(int i=0;i<n;i++){ for(int j=0;j<m;j++){ if(i%2==0){ cout<<"-"; } else{ cout<<"+"; } } cout<<endl; } } } } return 0; }