#include<stdio.h>
    int main() {
        int n, count;
        while ( scanf("%d", &n) != EOF) {
            count = 0;
            while (n != 1) {
                if (n % 2 == 0)
                    n = n / 2;
                else
                    n = (3 * n + 1) / 2;
                count++;
            }
            printf("%d", count);


        }
        return 0;
    }