t = int(input())
i = 0
while i < t:
    i += 1
    a, b = map(int, input().split())
    print('Case #' + str(i) + ': ' + str(a + b))

f5e438e204a147dccad9866ab3b81503fc8bd604
<mask token>

<mask token>
while i < t:
    i += 1
    a, b = map(int, input().split())
    print('Case #' + str(i) + ': ' + str(a + b))

t = int(input())
i = 0
while i < t:
    i += 1
    a, b = map(int, input().split())
    print('Case #' + str(i) + ': ' + str(a + b))
