powershell, 123 bytes

Result

WA

Duration

1294ms

Code [DL]

$a =(Read-Host).Split(" ")
$b =(Read-Host).Split(" ")
$c =(Read-Host).Split(" ")
$d =(Read-Host).Split(" ")
$b-=$a
echo($b)

stdin

09 57 90
87 53 37
17 77 27
21 74 85

stdout

09 57 90
87 53 37
17 77 27
21 74 85
87
53
37

stderr

Method invocation failed because [System.String[]] does not contain a method named 'op_Subtraction'.
At line:5 char:1
+ $b-=$a
+ ~~~~~~
+ CategoryInfo          : InvalidOperation: (op_Subtraction:String) [], RuntimeException
+ FullyQualifiedErrorId : MethodNotFound
 

strace