Write a python function to split a string into characters.
def split(word): 
    return [char for char in word] 
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a python function to split a string into characters.
def split(word): 
    return [char for char in word] [/INST]assert split('python') == ['p','y','t','h','o','n']
assert split('Name') == ['N','a','m','e']
assert split('program') == ['p','r','o','g','r','a','m']</s>