#include<iostream> #include<cstring> using namespace std; int main(){ int n; cin>>n; while(n--){ char a[50],b[50]; cin>>a>>b; int i=0,j=0,lena=strlen(a),lenahalf=lena/2; while(i<lenahalf) cout<<a[i++]; while(b[j]!='\0') cout<<b[j++]; while(i<lena) cout<<a[i++]; cout<<endl; } return 0; }