“TypeError：list indices必须是整数或切片，而不是str”

Question

I'm new to coding. I learned the basics of python and now I started my first project.I'm trying to code Tic Tac Toe. I made the bacic design and now I'm work on the real code. I'm trying to realise this with an coordinate system.I'm asking the user for the position where he wants to go. This information I put into a list. Then I use this information to change one of the numbers this represents the x or o in Tic Tac Toe but when it should change the number it gives me an Error the:"TypeError: list indices must be integers or slices, not str"

game = [["a b c"],
   [0, 0, 0],
   [0, 0, 0],
   [0, 0, 0],]

a = 0
b = 1
c = 2

def show_display():

    global count

    count = 0
    for row in (game):
        print (count, row)
        count += 1

    print (" ")

show_display()

x = input("Spieler 1,bitte geben sie ihren nächsten Zuge ein."
          "Achten sie auf eine korrekte Schreibweise! Beispiel:[a1]     Ihre Eingabe:")

print(x[1])
game[(x[2])][(x[1])] = 1 <-here is the problem

show_display()

That is the output:(It's ok I think)

0 ['a b c']
1 [0, 0, 0]
2 [0, 0, 0]
3 [0, 0, 0]

Spieler 1,bitte geben sie ihren nächsten Zuge ein.Achten sie auf eine korrekte Schreibweise! Beispiel:[a1] Ihre Eingabe: [a1]
a

(this isn't displayed properly)

Answer 1

This fixed it.

game = [["a b c"],
        [0, 0, 0],
        [0, 0, 0],
        [0, 0, 0],
       ]

def show_display():

    global count

    count = 0
    for row in (game):
        print (count, row)
        count += 1

    print (" ")

def main():

    a = 0
    b = 1
    c = 2
    show_display()

    x = input("Spieler 1,bitte geben sie ihren nächsten Zuge ein."
              "Achten sie auf eine korrekte Schreibweise! Beispiel:[a1]     Ihre Eingabe:")

    if(x[0] == "a"):
        game[int(x[1])][0] = 1
    elif(x[0] == "b"):
        game[int(x[1])][1] = 1
    elif(x[0] == "c"):
        game[int(x[1])][2] = 1

    show_display()

if __name__ == '__main__':
    main()