#include <bits/stdc++.h>
using namespace std;
int main(void){
  int A,B;
  string S;
  cin >> S;
  if(A < 1 || B > 5 ){
    cout<< "No" << endl;
    return 0;
  }
  if(S.find("-"); == A+1){
	cout << "No" << endl;
    return 0;
  }
  if(S.length() == A+B+1){
    cout << "Yes" << endl;
  }
}