Python program to enter a list containing number between 1 and 12 then replace all the entries in the list that are greater than 10 with 10

Ask the use to enter a list containing number between 1 and 12, then replace all the entries in the list that are  greater than 10 with 10

mylist=eval(input("Enter any List"))
print("Before Replace list is ",mylist)
a=0
for b in mylist:
    if b>10:
        mylist[a]=10
    a=a+1
print("After Replace list is ",mylist)

Enter any List[4,12,5,10,11,7]

Before Replace list is  [4, 12, 5, 10, 11, 7]

After Replace list is  [4, 10, 5, 10, 10, 7]