how to put it in a column

Simple question ..What is the easiest way to list my output in a column
like so

dddd dddd dddd dddd

output

dddd
dddd
dddd
dddd

Thanks

One way:

[house@universe] echo "ddd ddd ddd" | tr '[:blank:]' '\n'
ddd
ddd
ddd

Try:

echo "dddd dddd dddd dddd" | xargs -n1

Thanks Guys much appreciated