# take a list of teams
# return a round-robin schedule

teams = ["Team A", "Team B", "Team C", "Team D", "Team E", "Team F", "Team G", "Team H", "Team I", "Team J"]

# each round should have len(teams)//2 matches, as that should appropriately handle odd-numbered team counts

for r in range(1,len(teams)):
    print("Round", r)
    for i in range(0,len(teams)//2):
        print(f"{teams[i]} vs. {teams[i-r]}")