John is a man living in London. One day, his friend, a riddle maker, sent him a riddle:
I can change but not eliminate
Less than no in three have me
Who am I?
John couldn't solve the riddle. He was confused.
About two weeks later, John requested a hint. John's friend sent a letter:
Upon rewiewing my riddle, I realised that I made a mistake. My finger slipped and hit a key next to it. (My keyboard layout is, of course, the most common here.) I'm sorry if the typo made the riddle unsolvable.
But John still couldn't solve the puzzle. Can you help John solve the puzzle?
John's friend mistyped exactly one letter in the riddle's original version.
John's friend doesn't live in London.
The number of characters in the original version is the same as if no letters were mistyped.
John's friend's grandfather was killed by a Soviet artillery shell.
Hint 5 (which goes a long way towards giving away the answer):
The original version of the puzzle is not in English.