cnt = int(input())
for _ in range(cnt):
floor = int(input())
rooms = int(input())
dp = [[0] * rooms for _ in range(floor + 1)]
for i in range(rooms):
dp[0][i] = i + 1
for f in range(1, floor + 1):
for r in range(rooms):
dp[f][r] = sum(dp[f - 1][:r + 1])
print(dp[floor][rooms - 1])
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