'use strict';
function Main(input) {
  input.trim();
  input = input.split(" ");
  var a = input[0];
  var b = input[1];
  var c = input[2];
  var count = 3;
  
  if(a === b || a === c){
    count -= 1;
  }
  if(b === c){
    count -= 1;   
  }
  console.log(count);
}  
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
