
    Write a function that takes a bus route's encoded identifier string and converts it into a single-character route classification by summing the ASCII values of all characters in the identifier and applying modulo 26 to generate a letter code between A-Z. This simplified classification will be used for quick route optimization and traffic pattern analysis in the transportation network management system.
    

    
def get_Char(strr):
    """
    Write a function that takes a bus route's encoded identifier string and converts it into a single-character route classification by summing the ASCII values of all characters in the identifier and applying modulo 26 to generate a letter code between A-Z. This simplified classification will be used for quick route optimization and traffic pattern analysis in the transportation network management system.
    

    """
def get_Char(strr):
    """
    Write a function that takes a bus route's encoded identifier string and converts it into a single-character route classification by summing the ASCII values of all characters in the identifier and applying modulo 26 to generate a letter code between A-Z. This simplified classification will be used for quick route optimization and traffic pattern analysis in the transportation network management 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)