# read in the number of test cases
t = int(input())

for case_num in range(t):
    # get the list of runners
    runners = input().split()
    fastest = 0

    # the first entry runners[0] is actually the number of runners
    # so ignore it, i.e. runners[1:] is the list of values we just
    # read except for the first one
    for val in runners[1:]:
        # record the fastest runner seen so far
        fastest = max(fastest, int(val))
    
    print("Case " + str(case_num+1) + ": " + str(fastest))