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

### Instruction:
What is the truncating vowel final stem that has an example of mama-s?

### Inputs:
table_name: table, columns: ['Consonant final stem', 'Example: k\'ats- ("man")', 'Vowel final stem (truncating)', 'Example: mama- ("father")', 'Vowel final stem (non-truncating)', 'Example: Sakartvelo- ("Georgia")']

### Response:
SELECT Vowel final stem (truncating) FROM table WHERE Example: mama- ("father") = mama-s