```python
#!/usr/bin/env python3

def encode(msg):
output = ''

for i in range(len(msg)):
temp = ord(msg[i]) * 0x40
temp = temp >> 4
if 0xc0 <= temp < 0xe8:
output = str(int(msg[i]) * 0x1234) + output
else:
output = chr(ord(msg[i]) * 0x10) + output

return output

# TODO implement the decode function
def decode(msg):
output = ''
tmp_num = ''

for i in range(len(msg)):
temp = ord(msg[i])

if 0x30 <= temp < 0x39:
tmp_num = tmp_num + msg[i]
else:
if tmp_num != '':
output = str(int(tmp_num)//0x1234) + output
tmp_num = ''
output = str(chr(ord(msg[i])//0x10)) + output

return output

def shift(msg):
j = len(msg) - 1
output = ''

for i in range(len(msg)//2):
output += msg[i] + msg[j]
j -= 1

return output

# TODO implement the unshift function
def unshift(msg):
j = len(msg) - 1
output = ''

for i in range(0, len(msg), 2):
output += msg[i]
for i in range(len(msg)-1, 0, -2):
output +=msg[i]

return output

if __name__ == '__main__':
#shifted = shift('<REDACTED>')
#print(shifted)
#hashed = encode(shifted)
#print (hashed)
# print (unshift('<>RDEEDTAC'))
hashed = '4660۠ܰ4660ڀ٠װװސ23300۰ސݐ18640ܠݰװۀڠ18640۰ްؠѠȐՀȐа4660ѠȐѠߐА'
# CODE HERE
print(decode(hashed))
print(unshift(decode(hashed)))
```

Original writeup (https://github.com/spwpun/AFFCTF-Lite-2020-writeups/tree/main/RE).