You have a FIFO with a 2-cycle read latency feeding a pipeli…

You have a FIFO with a 2-cycle read latency feeding a pipeline that is 20 cycles deep. For an absorption FIFO with 32 elements, what  does the programmable full threshold need to be ensure no data is lost? The threshold is the number of elements in the FIFO at which almost/programmable full gets asserted.