Hopefully this makes sense. Details in the title. Let me know if more details are needed.
Code:
userinput = input("Line: ")
userlen = len(userinput)
output = userinput
count = 0
print(userinput[-0])
while count != userlen:
count2 = count - (count + 1)
output[count] = userinput[count2]
count = count + 1
print(output)