I want to print column 3 and 4 but without printing the headers empty column lines. 

```
header
tap
norm 
X Y       880 1787
X Y       3253 3439

```

Printing this via `awk '{print($3,$4)}'` gives 

```
(BLANK lines from header rows)
880 1787
3253 3439

```

This works to print column 19 only but how would I get it to print both columns?

```
awk  '$3{print $3}' 
880
3253

```

I want col3 col4

```
880 1787
3253 3439

```

I tried but get only column 3 printed

```
awk '$3{print $3}''$4{print $4}' 
880
1787
3253
3439

```