def caesarCipher(s, k):
    alphabets = 'abcdefghijklmnopqrstuvwxyz'
    encrypted_str = ""
    for i in range(len(s)):
        char = s[i]
        if char.isalpha():
            next_idx = alphabets.index(char.lower()) + k
            next_letter = alphabets[next_idx % 26]
            encrypted_str += next_letter.upper() if char.isupper() else next_letter
        else:
            encrypted_str += char
    return encrypted_str