Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the lowest number of Laps that have a Time of +24.440, and a Grid higher than 18?

### Inputs:
table_name: table, columns: ['Rider', 'Manufacturer', 'Laps', 'Time', 'Grid']

### Response:
SELECT MIN Laps FROM table WHERE Time = +24.440 AND Grid > 18