I'm trying to figure out how to remove specific index from list, but I don't know how to fix my problem. Can someone help me to solve this?

First, I have to get some numbers from users using input.

```
numbers = int(input("input any numbers: "))
list_num = list(numbers)

```

Second, if list\_num[0] == 1, remove that element.

Third, if list\_num[i+1] == list\_num[i], remove list\_num[i+1].

So, if the initial list goes like this: `list_num = [1,2,7,8,13,20,21]`,

the final list will be `list_num = [2,7,13,20]`

This is the program to be fixed:

```
 numbers = int(input("input any numbers:"))
 list_num = list(numbers)
 if list_num[0] ==1:
    list_num.remove(num[0])
 for i in range(1,len(list_num)-1, 1):
    if list_num[i] = list_num[i+1] -1:
         list_num.remove(num[i+1])
 print(list_num)

```