// yukicoder No.671
#include <bits/stdc++.h>
using namespace std;

int main()
{
  string s; cin >> s;

  string r = "1000000007";

  int tmp_ans = r.size() - s.size();

  if(tmp_ans < 0) cout << -1 * tmp_ans << "\n";
  else cout <<tmp_ans << "\n";

  return 0;
  
}