Given a graph of ~N~ nodes and ~M~ edges, print Graph Theory!

Input Specification

The first line will contain two integers ~N, M~ ~(1 \le N \le M \le 2)~.

The next ~M~ lines will each contain two integers, ~a, b~ ~(1 \le a, b \le N)~.

Output Specification

Print Graph Theory!

Sample Input

2 2
1 2
2 2

Sample Output

Graph Theory!