Yangjojang of The Year

You partied harder than anyone at freshman orientation, so you ended up as the first year class representative.

While planning a joint retreat with another school, you started wondering which of the nearby schools drinks the most.

Given how much alcohol each school drank over one year, print the name of the school with the largest amount.

The first line contains the number of test cases $T$.

The first line of each test case contains the number of schools $N$ $(1 \le N \le 100)$.

Each of the next $N$ lines contains a school name $S$ $(1 \le |S| \le 20)$ and the amount of alcohol $L$ $(0 \le L \le 10\,000\,000)$ that the school drank over the past year, separated by one space. $S$ is a string of upper and lower case letters with no spaces, and $L$ is an integer.

Within one test case, no two schools have the same amount.

For each test case, print on one line the name of the school with the largest amount.