hw1.py

"""
Sean Smith
cs 558

"""

"""
Problem 1



cipher = list("THVVWCZTQ! CZ WECQ YIAQQ, LFN JCII IVAHZ WEV DCPPVHVZYV MVWJVVZ VZYHLOWCFZ AZD ANWEVZWCYAWCFZ. WECQ RVQQATV CQ VZYHLOWVD JCWE A BVHL CZQVYNHV VZYHLOWCFZ QYEVRV. CDVAIIL, AZ VZYHLOWCFZ QYEVRV QEFNID AIIFJ FZIL ANWEFHCGVD OAHWCVQ, JEF XZFJ WEV XVL, WF HVAD WEV RVQQATV. EFJVBVH, LFN SNQW HVAD WEV RVQQATV JCWEFNW XZFJCZT WEV XVL. EVZYV, WEV VZYHLOWCFZ QYEVRV CQ CZQVYNHV.".lower())


replacement_dict = {"a": "A", "b": "v", "c": "i", "d": "D", "e": "h", "f": "o", "g": "z", "h": "r",  "i" : "l", "j": "w", "k": "k", "l": "y", "m": "b", "n": "u", "o": "p", "p": "f", "q": "s", "r": "m", "s": "j", "t": "g", "u": "u", "v": "e", "w": "t", "x": "k", "y": "c", "z": "n"}

string = ""
for i in range(len(cipher)):
    old_letter = cipher[i]
    if not old_letter in [" ", "!", ",", "."]:
        if replacement_dict[old_letter] != old_letter:
            cipher[i] = replacement_dict[old_letter].upper()
    string += cipher[i]

print(string)
print


Problem 2
"""

"""
cipher = list("Z LUNI R HLWED XBSX FRY VEP XBAW EENASE ACDP IMMW YG EHV PZZY GYK XBW XIYY EIRRCFK FJ CLW TVYWH. 'NI BGPU XBWWV XLMXYW NG FV WYDJ VZCVIEX, NZEK EFD QVR UJI TVYSXVH YIYRP' -GDO ".lower())

otp = list("abcde")

"""

def decode(cipher, otp):
    cipher = list(cipher.lower())
    otp = list(otp.lower())
    counter = 0
    decoded = ""
    for each in cipher:
        if not each in [" ", "!", ",", "."]:
            decoded += chr((abs((ord(each)-97) - (ord(otp[counter % len(otp)])-97))%26)+97)
            print(decoded)
            counter +=1
    return decoded

def encode(message, otp):
    cipher = list(message.lower())
    otp = list(otp.lower())
    counter = 0
    encoded = ""
    for each in cipher:
        if not each in [" ", "!", ",", "."]:
            encoded += chr(abs((ord(each)-97) + (ord(otp[counter % len(otp)])-97))%26+97)
            print(encoded)
            counter +=1
    return encoded


#print(decode("Z LUNI R HLWED XBSX FRY VEP XBAW EENASE ACDP IMMW YG EHV PZZY GYK XBW XIYY EIRRCFK FJ CLW TVYWH. 'NI BGPU XBWWV XLMXYW NG FV WYDJ VZCVIEX, NZEK EFD QVR UJI TVYSXVH YIYRP' -GDO ", "bcedf"))

#

print(encode("secretmessage", "cijthuuhmlfru"))

print(decode("umlklngledfxy", "cijthuuhmlfru"))