#include<stdio.h>
int main(){
    char arr[100];
    int count=0;
    
    for(int i=0;i<arr.length;i++){
        scanf("%c",&str[i]);}
    
    switch(str){
        case 'a':
        count++;
        break;
        case 'e':
        count++;
        break;
        case 'i':
        count++;
        break;
        case 'o':
        count++;
        break;
        case 'u':
        count++;
        break;
        case 'A':
        count++;
        break;
        case 'E':
        count++;
        break;
        case 'I':
        count++;
        break;
        case 'O':
        count++;
        break;
        case 'U':
        count++;
        break;
        
        default:
        count=-1;
    }
    printf("%d",count);
    return 0;
}