tictactoe w/ winner

x1=1
x2=2
x3=3
x4=4
x5=5
x6=6
x7=7
x8=8
x9=9
x="X"
o="O"
a=0
oturn="O's turn"
xturn="X's turn"
print(" press any letter to end the program")
print(" ")
print(" ")
print(" ")
print(" press a number from the grid to play")
print(" ")
print(" ")
print(" ")
while a < 9:
    print(x1,"|",x2,"|",x3,"    ",oturn)
    print("---------")
    print(x4,"|",x5,"|",x6)
    print("---------")
    print(x7,"|",x8,"|",x9)
    y = int(input())
    if y == x1:x1=o
    if y==x2:x2=o
    if y==x3:x3=o
    if y==x4:x4=o
    if y==x5:x5=o
    if y==x6:x6=o
    if y==x7:x7=o
    if y==x8:x8=o
    if y==x9:x9=o
    if x1==x2 and x2 ==x3 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x3)
            a=9
    elif x4==x5 and x5==x6 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x6)
            a=9
    elif x7==x8 and x8 ==x9 :
            print(x1,"|",x2,"|",x3,"   ",xturn)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x9)
            a=9
    elif x1==x4 and x4 ==x7 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x7)
            a=9
    elif x2==x5 and x5 ==x8 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x8)
            a=9
    elif x3==x6 and x6==x9 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x9)
            a=9
    elif x3==x5 and x5 ==x7 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x7)
            a=9
    elif x1==x5 and x5 ==x9 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x9)
            a=9
    else :
        a=a+1
        if a<9:
            print(x1,"|",x2,"|",x3,"   ",xturn)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            c = int(input())
        if c == x1:x1=x
        if c==x2:x2=x
        if c==x3:x3=x
        if c==x4:x4=x
        if c==x5:x5=x
        if c==x6:x6=x
        if c==x7:x7=x
        if c==x8:x8=x
        if c==x9:x9=x
        if x1==x2 and x2 ==x3 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x3)
            a=9
        elif x4==x5 and x5==x6 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x6)
            a=9
        elif x7==x8 and x8 ==x9 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x9)
            a=9
        elif x1==x4 and x4 ==x7 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x7)
            a=9
        elif x2==x5 and x5 ==x8 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x8)
            a=9
        elif x3==x6 and x6==x9 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x9)
            a=9
        elif x3==x5 and x5 ==x7 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x7)
            a=9
        elif x1==x5 and x5 ==x9 :
            print(x1,"|",x2,"|",x3)
            print("---------")
            print(x4,"|",x5,"|",x6)
            print("---------")
            print(x7,"|",x8,"|",x9)
            print("gg player",x9)
            a=9
        else :
            a=a+1