can some one explain me the error so i can update the nested loop

Question

NumberOfSSR = int(input("ENTER THE NUMBER OF TEAMS: "))
gamesSSR = ((NumberOfSSR - 1) * NumberOfSSR) // 2
print("YOUR TOURNAMENT HAVE ",gamesSSR, " MATCHES")
NewListOfTeamsA = []
for a in range (0, NumberOfSSR):
ListOfTeamsA = input("ENTER A TEAM: ")
NewListOfTeamsA.append(ListOfTeamsA)
print("THE TEAMS THAT HAVE REGISTERED FOR THE TOURNAMENT ARE:\n",NewListOfTeamsA)
TeamSize = NumberOfSSR
n = 1
for aaa in range(int(TeamSize)):
print("GAMES FOR THE ROUND ", "{}".format(n), "\n")
NewListOfTeamsA = (NewListOfTeamsA[len(NewListOfTeamsA) - TeamSize:len(NewListOfTeamsA)] + NewListOfTeamsA[1:len(NewListOfTeamsA) - TeamSize])
for aa in range(int(TeamSize)):
print("Game", "{}:".format(n), NewListOfTeamsA[0], "vs. ", NewListOfTeamsA[aa + 1])

print("Game", "{}:".format(n), NewListOfTeamsA[0], "vs. ", NewListOfTeamsA[aa + 1])
IndexError: list index out of range

Answer 1

use this instead: change NewListOfTeamsA[aa +1 ] to NewListOfTeamsA[aa] + 1

print("Game", "{}:".format(n), NewListOfTeamsA[aa], "vs. ", NewListOfTeamsA[aa] + 1)

and add
n = n + 1

to the first loop at the end to increment the GAMES FOR THE ROUND number.