#include <stdio.h>

int main() {
 int n,m;
 while(scanf("%d",&n)!=EOF)
 { m=0;
    while(n!=1)
   {
      if(n%2==0)
      {
       n=n/2;
       m++;
      }
     else
      {
       n=(3*n+1)/2;
       m++;
      }
    }
  printf("%d\n",m);
 }
 
    return 0;
}