matrix = [
    [1, 2, 3, 4],
    [5, 6, 7, 8],
    [9, 10, 11, 12],
    [13, 14, 15, 16]
]
tt = []
for i in range(len(matrix)):
    current_row = []
    for j in range(len(matrix)):
        current_row.append(matrix[j][i])
    tt.append(current_row)

for k in tt:
    print(*k, sep=" ")