import java.util.Scanner;
public class A414{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int num;

while(sc.hasNext()){
num = sc.nextInt();
if(num == 0) break;
System.out.println(getTimes(num));
}
}

public static int getTimes(int a){
int i;

for(i = 0; a > 0 && a % 2 == 1; i++)
a /= 2;
return i;
}
}