from socket import *

def cesarcipher(phrase):
    trans = ""
    for symbol in phrase:
        if symbol.isalpha():
            num = ord(symbol)
            num +=5

            if symbol.isupper():
                if num > ord('Z'):
                    num -= 26
            elif symbol.islower():
                if num > ord('z'):
                    num -= 26

            trans += chr(num)

    return trans

serverPort = 12000
serverSocket = socket(AF_INET,SOCK_STREAM)
serverSocket.bind(("",serverPort))
serverSocket.listen(1)
print ("the server is ready to galator")
while 1:
    connectionSocket,addr = serverSocket.accept()
    sentence = connectionSocket.recv(1024)
    returnSentence = cesarcipher(sentence)
    connectionSocket.send(returnSentence)
    connectionSocket.close()