Human: How would I check a string for a certain letter in Python? Assistant: 
Here is some code to check if string 'x' is  in list `['x', 'd', 'a', 's', 'd', 's']`

'x' in ['x', 'd', 'a', 's', 'd', 's']

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.