shufflebox

Description

I've learned that if you shuffle your text, it's 
elrlay hrda to tlle htaw eht nioiglra nutpi aws.

Find the text censored with question marks in output_censored.txt and 
surround it with DUCTF{}.

Author: hashkitten

Files

• output_censored.txt

aaaabbbbccccdddd -> ccaccdabdbdbbada
abcdabcdabcdabcd -> bcaadbdcdbcdacab
???????????????? -> owuwspdgrtejiiud

• shufflebox.py

import random

PERM = list(range(16))
random.shuffle(PERM)

def apply_perm(s):
	assert len(s) == 16
	return ''.join(s[PERM[p]] for p in range(16))

for line in open(0):
	line = line.strip()
	print(line, '->', apply_perm(line))