import java.util.Scanner;
/**
* Created by LXF on 2017/8/18.
*/
public class Test {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String str = scanner.nextLine();
if (str != null)
System.out.println(judgecf(str));
}
public static int judgecf(String str) {
int j = 0;
for (int i = 0; i < str.length()-1; i++) {
if ((str.charAt(i)^str.charAt(i + 1)) != 0) {
j++;
}
j++;
}
return j;
}
}