aaaaaaaa 09
bbbbbbbb 90
ccccccccccccccc 89
ddddd 09

useing sed/awk/replace  , in the above text i want to remove anything that comes after the first space in line. for example the output will be  :

aaaaaaaa
bbbbbbbb
ccccccccccccccc
ddddd

any help will be appereciated .

aaaaaaaa 09 bbbbbbbb 90 ccccccccccccccc 89 ddddd 09 

Using sed/awk/replace, in the above text I want to remove anything that comes after the first space in each line. For example the output will be:

aaaaaaaa bbbbbbbb ccccccccccccccc ddddd 

any help will be appreciated.