First, we got weird strings from the challenge
JOHNLOVEJOHNJOHNJOHNLOVEJOHNJOHNJOHNLOVECOFFEECOFFEEJOHNJOHNCOFFEEJOHNLOVEJOHNJOHNLOVECOFFEECOFFEEJOHNLOVEJOHNCOFFEEJOHNCOFFEELOVECOFFEECOFFEECOFFEECOFFEELOVECOFFEECOFFEEJOHNJOHNCOFFEEJOHNLOVEJOHNCOFFEEJOHNCOFFEELOVECOFFEEJOHNLOVECOFFEECOFFEEJOHNCOFFEELOVECOFFEECOFFEEJOHNCOFFEELOVECOFFEELOVECOFFEECOFFEELOVEJOHNCOFFEELOVECOFFEELOVECOFFEECOFFEEJOHNJOHNCOFFEEJOHNLOVEJOHNCOFFEEJOHNCOFFEELOVECOFFEEJOHNLOVEJOHNCOFFEELOVECOFFEECOFFEEJOHNJOHNCOFFEEJOHNLOVEJOHNCOFFEEJOHNCOFFEELOVECOFFEEJOHNLOVECOFFEECOFFEEJOHNLOVECOFFEECOFFEECOFFEELOVECOFFEELOVECOFFEECOFFEEJOHNJOHNCOFFEEJOHNLOVECOFFEECOFFEECOFFEECOFFEELOVECOFFEECOFFEELOVEJOHNJOHNCOFFEELOVECOFFEECOFFEECOFFEECOFFEELOVECOFFEECOFFEEJOHNJOHNCOFFEEJOHNLOVEJOHNCOFFEECOFFEECOFFEELOVECOFFEEJOHNCOFFEECOFFEELOVEJOHNJOHNJOHNLOVEJOHNJOHNJOHNLOVEJOHNCOFFEECOFFEELOVECOFFEECOFFEEJOHNJOHNCOFFEEJOHNLOVECOFFEEJOHNJOHNCOFFEELOVECOFFEEJOHNCOFFEELOVECOFFEELOVECOFFEECOFFEECOFFEELOVECOFFEECOFFEECOFFEELOVECOFFEECOFFEEJOHNLOVECOFFEEJOHNCOFFEELOVECOFFEE
These strings have three words. And if we look carefully at the strings we will find out that in the strings don't have 'LOVELOVE'. It just has single 'LOVE'. So I figured it out this is morsecode use 'LOVE' for '/'.
- JOHN: '-'
- LOVE: '/'
- COFFEE: '.'
I coded python to convert the strings to morsecode and decode morsecode to plaintext.
┌──(kali㉿kali)-[~/CTFriends-JOHNLOVECOFEE]
└─$ python3 solve.py
CTFr{too_much_caffeine_can_cause_high_blood_pressure}