Matching numbers
                                         
                                         
                            
                             
                                         
                                          Problem 
                         
                                 Three integers are given. Determine how many of them match. The program should output one of the numbers: 3 (if all match), 2 (if two match), or 0 (if all numbers are different). 
 
Input
Three integers are entered, one per line.
Imprint 
Output the answer to the problem.
 
Examples