hdu 2562

#include<iostream>
using namespace std;
char a[55];

int main()
{
	int n;
	scanf("%d", &n);
	getchar();
	while(n--)
	{
		gets(a);
		int i;
		char ch;
		for(i = 1; i < strlen(a); i += 2)
		{
			ch = a[i-1];
			a[i-1] = a[i];
			a[i] = ch;
		}
		printf("%s\n", a);
	}
	return 0;
}