IP-address

In order to access the Internet, each computer is assigned a so-called IP-address. It consists of four integers in the range from 0 to 255 separated by dots. The next three lines show three valid IP-address:

127.0.0.0

192.168.0.01

255.00.255.255

Write a program that determines whether a given string is a valid IP-address.

Input

The input to the program served a string no longer than 15 characters, which includes figures and exactly three points.

Output

If the string is a valid IP-address, you must withdraw 1, 0 otherwise.

Examples