
import java.util.Scanner;

public class Main {
	
	public static void main (String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		
		int cnt = 1;
		
		while (true) {
			if (n == 1 || n == 2 || n == 4) {
				System.out.println(cnt + 3);
				return;
			}
			if (n % 2 == 0) n /= 2;
			else n = n * 3 + 1;
			cnt++;
		}
	}
	
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz