Убрать из введенного слова все гласные

#include <iostream>
#include <vector>
#include <iterator>
 
using namespace std;
 
int main()
{
    vector <char> word(100);
    cin >> word;
    for(int i=0; i<word.size(); i++)
    {
        if(word[i]=='a' || word[i]=='A' || word[i]=='e' || word[i]=='E' || 
        word[i]=='y' || word[i]=='Y' || word[i]=='u' || word[i]=='U' ||
        word[i]=='i' || word[i]=='I' || word[i]=='o' || word[i]=='O' )
        {
            word.erase(word.begin()+i);
        }
        copy(word.begin(), word.end(), ostream_iterator<char>(cout, " "));
    }
    
}

int main()
{
    string word;
    cin >> word;
    for(int i = word.length() - 1; i >= 0; --i)
    {
        if(word[i]=='a' || word[i]=='A' || word[i]=='e' || word[i]=='E' || 
        word[i]=='y' || word[i]=='Y' || word[i]=='u' || word[i]=='U' ||
        word[i]=='i' || word[i]=='I' || word[i]=='o' || word[i]=='O' )
        {
            word.erase(i, 1);
        }
    }
    cout << word;
    
}

copy(std::istream_iterator<char>(cin), std::istream_iterator<char>(), back_inserter(word));