NO numerals (test cases 3 & 4 are failing)

Question

#Code Coach
#No numerals
#Test Cases 3 & 4 are failing
#Let me know if there's any wrong in program
#Thank you
x=input()
b=["zero","one","two","three","four","five","six","seven","eight","nine", "ten" ]
for i in range(11):
if(str(i) in x):
y=x.replace(str(i),b[i])
print(y)

Answer 1

You need also to convert 10 to ten (see description).

Answer 2

Did you test your code?
You have to make sure that you not convert 10 to onezero.

Answer 3

I changed. But the result is same