/*
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 * and open the template in the editor.
 */

/**
 *
 * @author ales
 */
public class T3Ex08 {

	static java.util.Scanner in;

	public static void main(String args[]) {
		in = new java.util.Scanner(System.in);

		int result = 0;
		while ( !(result == -1) ) {
			result = casoDePrueba();
			if ( result != -1 ) {
				System.out.println(result);
			}
		}

	}
	public static int casoDePrueba() {
		String caso = in.nextLine();
		char caracter = caso.charAt(0);
		int desp = 'p' - caracter;
		int counter = 0;
		String finalString = "";

		for ( int i = 1; i < caso.length(); i++ ) {
			caracter = caso.charAt(i);
			caracter = Anadir(caracter, desp);
			finalString += String.valueOf(caracter);
		}

		if ( finalString.equals("FIN") ) {
			return -1;
		}
		finalString = finalString.toLowerCase();
		for ( int i = 0; i < finalString.length(); i++ ) {
			caracter = finalString.charAt(i);
			if ( caracter == 'a' || caracter == 'e' || caracter == 'i' || caracter == 'o' || caracter == 'u' ) {
				counter++;
			}
		}
		return counter;
	}

	private static char Anadir(char caracter, int desp) {

		if ( !Character.isAlphabetic(caracter) ) {
			return caracter;
		}
		int valorAanadir = 1;
		if ( desp < 0 ) {
			valorAanadir = -1;
		}
		while ( desp != 0 ) {
			caracter = (char)( ((int)caracter) + valorAanadir );
			if ( caracter == 'z' + 1 ) {
				caracter = 'a';
			}
			else if ( caracter == 'a' - 1 ) {
				caracter = 'z';
			}
			else if ( caracter == 'Z' + 1 ) {
				caracter = 'A';
			}
			else if ( caracter == 'A' - 1 ) {
				caracter = 'Z';
			}
			desp -= valorAanadir;
		}
		return caracter;
	}

}