import java.util.Scanner;
public class printFrequencyOfVowelsInSentence 
{  
    public static void main(String[] args)
    {  
        String sen="";
        char ch=' ';
        int i=0,len=0,count=0;
        Scanner sc = new Scanner(System.in);    
        
        System.out.println("Enter a sentence");   
        sen = sc.nextLine(); 
        
        sen=sen.toLowerCase();
        len=sen.length();
        for(i=0;i< len;i++)
        {
            ch=sen.charAt(i);
            if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')
            {
                count++;
            }
        }
        System.out.println("Frequency of vowels in sentence is:"+count);
    }  
}