
    Write a function that extracts the staffing level indicator (last character) from each emergency room shift code to analyze historical staffing patterns. The shift codes are stored in a tuple, where each code ends with a letter representing the required staffing level (A for full, B for moderate, etc.), and the function should return only these staffing level indicators.
    

    
def extract_rear(test_tuple):
    """
    Write a function that extracts the staffing level indicator (last character) from each emergency room shift code to analyze historical staffing patterns. The shift codes are stored in a tuple, where each code ends with a letter representing the required staffing level (A for full, B for moderate, etc.), and the function should return only these staffing level indicators.
    

    """
def extract_rear(test_tuple):
    """
    Write a function that extracts the staffing level indicator (last character) from each emergency room shift code to analyze historical staffing patterns. The shift codes are stored in a tuple, where each code ends with a letter representing the required staffing level (A for full, B for moderate, etc.), and the function should return only these staffing level indicators.
    

    """
    res = list((sub[len(sub) - 1] for sub in test_tuple))
    return res