import enchant

print("\n\n");
en = enchant.Dict("en_US")


def caesar_multiple(plain_text, rot):
    lower_text=plain_text.lower()
    en_text=""
    for char in lower_text:
        new_ascii_char = ord(char)-rot    #subtracting the key from the ascii value #ord converts charachter to ascii value
        if char == " ":
            encrypt_char = " "
        elif new_ascii_char>=97:
            encrypt_char= chr(new_ascii_char)
        else:
            new_ascii_value= ord('z')-(ord('a')-new_ascii_char)+1
            encrypt_char = chr(new_ascii_value)
        en_text = en_text+encrypt_char        # encrypted text
    return en_text


for filenum in range(1,6):
    filename = str(filenum) + ".txt"
    file = open(filename)    #open file
    text = file.read()      #read file
    for rot in range(1,27):
        decryption_found = True
        decrypted = caesar_multiple(text, rot)

        for word in decrypted.split():
            is_english_word = en.check(word)
            if not is_english_word:
                decryption_found = False
                break

        if decryption_found:

            print("File: " + filename + " | Encrypted text: " + text + " | Decrypted text: " + decrypted + " | Key: " + str(rot))

            print("\n")
            break