How do I find and delete a string at end of a line?

I have multiple lines with this pattern:

SEQ 338 13 
SEQ 350 13 
SEQ 380 13 

…and wish to detect and delete only the ’13’ out of each line.

I have tried this RegEX but this fails”

[RegEx toggled ON]
FIND: SEQ ddd 13
REPLACE: SEQ ddd 

…but it replaces everything with ‘SEQ ddd ‘

I would like it to read instead:

SEQ 338  
SEQ 350  
SEQ 380  

Appreciate the clarifying help