What is the ab ripper x when exercise is x stretch?
CREATE TABLE table_74121 (
    "Program" text,
    "Exercise" text,
    "Week" text,
    "Muscles Worked" text,
    "Type" text,
    "Ab Ripper X" text,
    "Length" text,
    "Equipment" text
)
SELECT "Ab Ripper X" FROM table_74121 WHERE "Exercise" = 'X Stretch'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the ab ripper x when exercise is x stretch? ### Input: CREATE TABLE table_74121 (
    "Program" text,
    "Exercise" text,
    "Week" text,
    "Muscles Worked" text,
    "Type" text,
    "Ab Ripper X" text,
    "Length" text,
    "Equipment" text
) ### Response: SELECT "Ab Ripper X" FROM table_74121 WHERE "Exercise" = 'X Stretch'