Caeser decrypter

import os

def clear():
    os.system('cls' if os.name=='nt' else 'clear')

def pause():
    input("\nPress ENTER to continue!")

def caesarDecrypt(text):
    frequencyLetters = [0 for i in range(26)]
    for c in text:
        ucode = ord(c)
        ucode -= 97

        if ucode < 26 and ucode >= 0:
            frequencyLetters[ucode] += 1

    clear()
    print("-=|-=|-=|Decrypted Texts sorted by frequency|=-|=-|=-")

    for i in range(26):
        MostOftenLetter = 0
        for c in range(len(frequencyLetters)):
            if frequencyLetters[MostOftenLetter] < frequencyLetters[c]:
                MostOftenLetter = c

        print(str(MostOftenLetter) + " : " + str(frequencyLetters[MostOftenLetter]))
        input()

        if frequencyLetters[MostOftenLetter] == 0:
            break

        frequencyLetters[MostOftenLetter] = 0

        key = MostOftenLetter - 4
        print("Decrypted Text with key " + str(key) + ":")
        textDecrypted = decryptCaesarKey(text, key)

        if len(textDecrypted) < 80:
            print(textDecrypted)
        else:
            print(textDecrypted[0:80])
        print()

def decryptCaesarKey(text, key):
    textDecrypted = []
    for c in text:
        c = c.lower()
        ucode = ord(c)
        ucode -= 97

        if ucode < 0 or ucode > 25:
            textDecrypted.append(c)
            continue

        c = ucode - key + 97
        if c < 97:
            c = 26 + c

        elif c > 122:
            c = c - 26

        c = chr(c)
        textDecrypted.append(c)

    textDecrypted = "".join(textDecrypted)
    return textDecrypted

    #####################################
    #                                   #
    #            Entry Point            #
    #                                   #
    #####################################

while True:
    clear()
    print("-~=-~=-~=Decrypt Manager by PowerOfRandom=~-=~-=~-")
    print("1 - Decrypt Caeser via Input")

    eingabe = input("\nChose: ")

    if eingabe == "1":
        clear()
        encryptedText = input("Encrypted Text: ")

        caesarDecrypt(encryptedText)

        pause()

    else:
        print("\nChose one of the numbers to start!")
        pause()