#!/usr/bin/env python3
# -*- coding: utf-8 -*-

file = "./input.txt"
#file = "./ex.txt"
from time import time
import re
start_time = time()

def caesar_chiffre(text, verschiebung):
    ergebnis = ""
    for char in text:
        if char.isalpha():
            ascii_offset = 65 if char.isupper() else 97
            verschobener_ascii = (ord(char) - ascii_offset + verschiebung) % 26 + ascii_offset
            ergebnis += chr(verschobener_ascii)
        else:
            ergebnis += char
    return ergebnis

def de_chiffre(txt:str, rot:int)-> str:
    result = []
    txt = txt.split("-")
    for part in txt:
        result.append(caesar_chiffre(part, rot))
    return " ".join(result)

if __name__ == "__main__":
    sol = 0
    input_file = open(file, "r")
    for line in input_file:
        line = line.strip()
        if line == "":
            continue
        else:
            pat = r'^([a-z-]+)-(\d+)\[([a-z]+)\]$'
            match = re.match(pat,line)
            out_txt = de_chiffre(match.group(1), int(match.group(2)))
            if "north" in out_txt:
                print(f"{out_txt} - {match.group(2)}")
    input_file.close()

    print(f'Runtime: {time()-start_time:.4f} s')