How to convert rows to columns in unix

Question

I want my Unix file output, which has each value output on a new line, to be converted into grouped rows as shown below.

Say my output file in Unix looks like this:

Answer 1

If you are looking for a shell script, you can do this as the number of lines to be printed in the output seems to have to fixed length:

while read line1; do
  read line2
  read line3
  read line4
  echo $line1 $line2 $line3 $line4 >>output
done