for _ in range(int(input())):
n = int(input())
d = {}
for i in range(1, 11):
d[i] = 0
for __ in range(n):
a, b = map(int, input().split())
d[b] = max(d[b], a)
for i in range(1, 11):
if d[i] == 0:
print("MOREPROBLEMS")
break
else:
print(sum(d.values()))