Off topic:Filter .bed file by numbers in final column

Question

[kdc15]

Hi,

I would like to filter a .bed file by numbers in the last column:

chr1    0       14400   18
chr1    14400   19000   6
chr1    19000   567400  18
chr1    567400  567800  10
chr1    567800  713200  18
chr1    713200  713800  2
chr1    713800  714600  1
chr1    714600  715400  2
chr1    715400  724000  6

How can I create a new file with lines that only contain 1,2 and 18? like this:

chr1    0       14400   18
chr1    19000   567400  18
chr1    567800  713200  18 
chr1    713200  713800  2
chr1    713800  714600  1
chr1    714600  715400  2

Would it involve using the awk command?

Many Thanks