
    Write a function that generates a validation character for delivery route identifiers by converting the route string into a single checksum character, where the checksum is calculated by summing the ASCII values of all characters in the route identifier and taking modulo 26 to map it to a letter (A-Z). This validation character helps ensure route integrity in the fleet management tracking system.
    

    
def get_Char(strr):
    """
    Write a function that generates a validation character for delivery route identifiers by converting the route string into a single checksum character, where the checksum is calculated by summing the ASCII values of all characters in the route identifier and taking modulo 26 to map it to a letter (A-Z). This validation character helps ensure route integrity in the fleet management tracking system.
    

    """
def get_Char(strr):
    """
    Write a function that generates a validation character for delivery route identifiers by converting the route string into a single checksum character, where the checksum is calculated by summing the ASCII values of all characters in the route identifier and taking modulo 26 to map it to a letter (A-Z). This validation character helps ensure route integrity in the fleet management tracking 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)