
    Create a function that processes a delivery route's identifier string (containing traffic, weather, and street data) and generates a single-letter route classification by summing the ASCII values of all characters and applying modulo 26 to determine the final classification letter. This classification system helps dispatchers quickly categorize and prioritize delivery routes in the real-time navigation system.
    

    
def get_Char(strr):
    """
    Create a function that processes a delivery route's identifier string (containing traffic, weather, and street data) and generates a single-letter route classification by summing the ASCII values of all characters and applying modulo 26 to determine the final classification letter. This classification system helps dispatchers quickly categorize and prioritize delivery routes in the real-time navigation system.
    

    """
def get_Char(strr):
    """
    Create a function that processes a delivery route's identifier string (containing traffic, weather, and street data) and generates a single-letter route classification by summing the ASCII values of all characters and applying modulo 26 to determine the final classification letter. This classification system helps dispatchers quickly categorize and prioritize delivery routes in the real-time navigation system.
    

    """
    summ = 0
    for i in range(len(strr)):
        summ += ord(strr[i]) - ord('a') + 1
    if summ % 26 == 0:
        return ord('z')
    else:
        summ = summ % 26
        return chr(ord('a') + summ - 1)