PROGRAMMING:Looking for missing data

There are several numbers, the number is an integer starting from 0, the maximum value is not more than 299, the number is not more than 300, input through the keyboard, end with - 1, input may occur in the process of missing, please find out the missing number and print it out according to the specified format.
###Input format:
Enter n positive integers, ending with - 1.
###Output format:
Output all the missing numbers, each number occupies 4 spaces, left aligned. Each line only outputs 6, and the last line must not be empty.
###Input sample 1:
Here is a set of inputs. For example:
```in
0 2 3 4 6 -1
```
###Output sample 1:
The corresponding output is given here. For example:
```out
1 5
```
###Input sample 2:
Here is a set of inputs. For example:
```in
0 1 2 5 8 13 14 18 20 -1
```
###Output sample 2:
The corresponding output is given here. For example:
```out
3 4 6 7 9 10
11 12 15 16 17 19
```







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