"""Caesar cipher solver"""

# variables go here
alphabet = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"
increment_repeat = 0
letter_list = []

input_string = input("string? ")
letter_amount = len(input_string)

while True:
    key = int(input("key? "))

    if 27 > key > -27:
        break

    else:
        print("key must be below 27 and above -27")

for x in range(0, letter_amount):
    if (input_string[0+increment_repeat]) == " ":
        increment_repeat += 1
        letter_list.append(" ")
    elif (input_string[0+increment_repeat]).isnumeric():
        increment_repeat += 1
        letter_list.append(input_string[-1+increment_repeat])
    else:
        letter = ord(input_string[0 + increment_repeat])
        increment_repeat += 1
        letter_list.append(alphabet[(letter - 97) + key])

printable_string = ''.join(letter_list)
print(printable_string)