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

    }
}