10.py

n = int(input())
print("А Б В")

arr = [1, 1, n - 2]
print(*arr)

for i in range(2, n - 1):
    arr = [1, i, n - 1 - i]
    print(*arr)

for i in range(2, n - 1):
    for j in range(1, n - i):
        arr = [i, j, n - j - i]
        print(*arr)