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.
# -*- coding: utf-8 -*-
for c in range(100000):
    x = int(input().strip())
    if(x < 1):
        break
    print("Case {0}: {1}".format(c,x))
# -*- coding: utf-8 -*-
for c in range(1,10001):
    x = int(input().strip())
    if(x < 1):
        break
    print("Case {0}: {1}".format(c,x))