Even Prize

A customer in the Personalised Gift Store is awarded a prize when their bill number is a 3-digit number and all the 3 digits in the number are even.

Write a program to identify the prize winners.
 

Input and Output Format:
Input consists of a number which corresponds to the bill number.
Output consists of a string that is either 'yes' or 'no'. Output is yes when the customer receives the prize and is no therwise.

Sample Input 1:
565

Sample Ouput 1:
no


Sample Input 2:
620

Sample Ouput 2:
yes

Sample Input 3:
66

Sample Ouput 3:
no

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