PROGRAMMING:Insert element (array) at specified position

Store an even number between 1 and 100 in an array. Input an integer x and the insertion position K, insert x into the array, and output the result array.
###Input format:
x k
Position K starts at 0.
###Output format:
If the position K is unreasonable and exceeds the effective value, error will be output
In other cases, the output result array is separated by a space.
###Input sample 1:
```in
-77 4
```
###Output sample 1:
```out
2 4 6 8 -77 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100
```
###Input sample 2:
```in
-77 60
```
###Output sample 2:
```out
error.
```







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