문제 : [SWEA D2] 1946. 간단한 압축 풀기
T = int(input())
for t in range(1, T + 1):
N = int(input())
arr = [list(input().split(" ")) for _ in range(N)]
count = 0
print(f"#{t}")
for a in arr:
for i in range(int(a[1])):
print(a[0], end = "")
count += 1
if count % 10 == 0:
print()
print()