Sort by Age

The age and the name of every member of an online judge are given in the order they joined. Write a program that sorts the members by increasing age, and puts the member who joined earlier first when two ages are equal.

The first line contains the number of members $N$. ($1 \le N \le 100000$)

Each of the next $N$ lines contains one member's age and name, separated by a single space. The age is an integer between $1$ and $200$. The name is a string of at most $100$ uppercase and lowercase English letters. The lines are given in the order the members joined.

Print the sorted result on $N$ lines. Each line holds one member's age and name, separated by a single space. Members of the same age are printed in the order they joined.