#include<stdio.h>
int main()
int count;
char str;
{
    scanf("%c",&str);
    count=0;
    if(str == 'a','e','i','o','u','A','E','I','O','U'){
        count=count+1;
    }
    else{
        printf("-1");
    }
    printf("%d",count);
    return 0;
}