n = int(input("Lines: "))
matrix = []
a = []
j=0
for i in range(n):
a = []
s = input().split()
for j in range(len(s)):
a.append(s[j])
matrix.append(a)
print("{", end="")
for i in range(n):
print("{", end="")
for j in range(len(matrix[i])):
if j!= len(matrix[i])-1:
print(matrix[i][j], end=" ,")
else:
print(matrix[i][j], end="}")
if i!=n-1:
print(",", end="")
else:
print(print("}", end=""))
# your code goes here
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