Number of words

#include<bits/stdc++.h>
using namespace std;
int main(){
    string a;
    int s=0;
while(cin>>a){
        if(a[0]!=',' and a[0]!='.' and a[0]!='!' and a[0]!='?' and a[0]!='-'){
            s++;
        }
    }
    cout<<s<<endl;
    return 0;
}