@@ -0,0 +1,12 @@
+import sys
+def foo(n):
+ if n == 1:
+ return 0
+ if n % 2 == 0:
+ return foo(n / 2) + 1
+ else:
+ return foo(3 * n + 1) + 1
+
+for line in sys.stdin.readlines():
+ for n in map(int,line.strip().split()):
+ print foo(n)
