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

### Instruction:
What is the Heat of the Player with a Rank of 18 or less and Result of 55.15?

### Inputs:
table_name: table, columns: ['Rank', 'Heat', 'Name', 'Nationality', 'Result']

### Response:
SELECT Heat FROM table WHERE Rank < 18 AND Result = 55.15