## Solution script

import string

cipher = "UFJKXQZQUNB"
key = "SOLVECRYPTO"
alphabet = string.ascii_uppercase
uppercase_offset = ord('A')

dicts = {}  # Dictionary to store the dictionaries

for k in key:
    key_loc = ord(k) - uppercase_offset
    
    dicts[k] = {}  # Initialize an empty dictionary for k
    for i, a in enumerate(alphabet):
        dicts[k][alphabet[(i + key_loc) % 26]] = a

plain=""
for i,c in enumerate(cipher):
    plain+=dicts[key[i]][c]

print("plain=",plain)

### output

┌──(kali㉿kali)-[~/code]
└─$ /bin/python /home/kali/code/easy1.py
plain= CRYPTOISFUN

## Easier way: online decoder
https://www.boxentriq.com/code-breaking/one-time-pad

## ref
- https://zh.wikipedia.org/zh-tw/%E4%B8%80%E6%AC%A1%E6%80%A7%E5%AF%86%E7%A2%BC%E6%9C%AC