def GenPairs(N):
N = N + N%2
for i in range(N-1):
print("round", i+1)
print(1,':', N - i, end = '; ')
for j in range(1, N // 2):
print(2 + (N - i + j - 2) % (N - 1), ':', 2 + (N - i - j - 2) % (N - 1), end = '; ' if j < N//2-1 else "\n")
for n in range(3, 8):
print(n, 'players')
GenPairs(n)