#include<iostream>
#include<string>
#include<cmath>
#include<algorithm>
#include<vector>
using namespace std;
#define Alaa ios_base::sync_with_stdio(false);cin.tie(0);
#define ll long long
#define r 1000000007;
bool check_vow(char d){
if(d=='a'||d=='e'||d=='i'||d=='o'||d=='u'||d=='y'){
return true;
}
return false;
}
int main()
{
Alaa;
int n; cin>>n; string s; cin>>s; int cnt=0;
int cntv=0, cntc=0;
for(int i=0;i<s.length();i++){
if(check_vow(s[i])){
cntv++;
}
else if(!check_vow(s[i])){
cntc++;
}
if(cntv>=1&&cntc>=1){
cnt++;
cntv=0; cntc=0;
}}
cout<<cnt;
return 0;
}
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