echo "a b c d e f g" | awk '{print $3$4}'

##</code><code>##

1: ... | perl -ne 'printf("%s%s", (split(" ", $_, 5))[2,3]);'
2: ... | perl -ne 'print /(?:\S+ ){2}(\S+) (\S+)/
3: ... | perl -ane 'print "$F[2]$F[3]";'
4: I even wrote my own subroutine using index/substr to extract what i need ...