#include<bits/stdc++.h> using namespace std; int main(){ string a,b=""; getline(cin,a); int len=a.size(); for(int i=0;i<len;i++){ if(a[i]=='a'||a[i]=='e'||a[i]=='i'||a[i]=='o'||a[i]=='u'|| a[i]=='A'||a[i]=='E'||a[i]=='I'||a[i]=='O'||a[i]=='U') { b += a[i]; // 直接拼接元音字母 } } cout << b; return 0; }