#include<bits/stdc++.h> using namespace std; int main() { int n, j, i, c; char a[50], b[50]; cin >> n; for (i = 0; i < n; i++) { cin >> a >> b; c = strlen(a) / 2; for (j = 0; j < c; j++) { cout << a[j]; } cout << b; for (j = c; j < strlen(a); j++) { cout << a[j]; } cout << endl; } return 0; }