In the online judge system, a judge file may include multiple datasets to check whether the submitted program outputs a correct answer for each test case. This task is to practice solving a problem with multiple datasets.  Write a program which reads an integer x and print it as is. Note that multiple datasets are given for this problem.
def printcase(n):
    print(n)

if __name__ == "__main__":
    ret = printcase(input())

def printcase():
    i = 1
    n = int(input())
    while n != 0:
        print("Case %d: %d" %(i ,n))
        n = int(input())
        i = i + 1
    return 0

if __name__ == "__main__":
    ret = printcase()
