Moving last

I have some files in this format:

AAA BBB CCC LAST.txt

AAA BBB CCC DDD LAST.txt

AAA BBB CCC DDD EEE LAST.txt

They have different lengths but the common thing is I want to move LAST to the front:

AAA BBB CCC LAST.txt --> LAST AAA BBB CCC.txt

AAA BBB CCC DDD LAST.txt --> LAST AAA BBB CCC DDD.txt

AAA BBB CCC DDD EEE LAST.txt --> LAST AAA BBB CCC DDD EEE.txt

Appreciate your guidance how to do this. Thanks.

Replace: (.*) (.*)
with: \2 \1
Use regular expressions

Reply to #2:

Thanks David!