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- def forward(n):
- if n == 1:
- print(1, 1, 3)
- return
- forward(n - 1)
- print(n, 1, 2)
- backward(n - 1)
- print(n, 2, 3)
- forward(n - 1)
- def backward(n):
- if n == 1:
- print(1, 3, 1)
- return
- backward(n - 1)
- print(n, 3, 2)
- forward(n - 1)
- print(n, 2, 1)
- backward(n - 1)
- n = int(input())
- forward(n)
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