Rating:
While checking the txt file i noticed that some lines don't have the same phrase.
Some lines which we need have a different letter.
So i wrote a script to recognize the changed line and found the flag.
```
# Define the phrase you're searching for
phrase = "I WILL NOT BE SNEAKY"
# Initialize an empty string to store differing letters
all_differing_letters = ""
# Open the text file
with open("chalkboardgag.txt", "r") as file:
# Iterate through each line in the file
for line in file:
# Remove leading/trailing whitespaces and newline characters
clean_line = line.strip()
# Check if the line contains the phrase
if phrase not in clean_line:
# Compare each character in the line with the corresponding character in the phrase
for i in range(min(len(phrase), len(clean_line))):
if clean_line[i] != phrase[i]:
# Append differing letters to the accumulator string
all_differing_letters += clean_line[i]
else:
# If the line contains the phrase, move to the next line
continue
# Print all differing letters found in all lines
print("All differing letters:", all_differing_letters)
```
Flag: `bcactf{BaRT_W0U1D_B3_PR0uD}`
