replace space between strings: notepad ++

[nischalinn]

Suppose I've text file where:

aaa bbb
sss iii uuu
lds iie riowq urew

How can I replace empty space between the strings using notepad ++ such the output would be like this:
aaabbb
sssiiiuuu
ldsiieriowqurew

Thanks!

[Luuk]

In the menu under 'Search' you will find 'Replace (Ctrl+H)'
After 'Find what:' type a space
After 'Replace with:' type no thing
Hit the 'Replace All' button......... ..