Задача 1

#coding: utf-8

def v_encrypt(key):
    text = input()
    key *= len(text) // len(key) + 1
    key = key.lower()
    j = 0
    new_text = ''
    for i in range(len(text)):
        if not text[i].isalpha():
            new_text += text[i]
            continue
        mj = ord(text[i]) - (ord('a') if text[i].islower() else ord('A'))
        kj = ord(key[j]) - (ord('a') if key[j].islower() else ord('A'))
        cj = (mj + kj) % 26 + (ord('a') if text[i].islower() else ord('A'))
        new_text += chr(cj)
        j += 1
    return new_text