LSMW - delete entries from z-table

Dear experts,

Please, help me out with the following challenge. I need to create LSMW that will delete entries from z-table (that could be a standard table, for that matter). The key consists of 3 fields. So I am wondering how, while create butch-input, I could specify that this particular entry has to be deleted?

If you could provide a link to a useful document or share your experience, I would appreciate that.