205: Missing whitespace between key and answer
You started a line with curly brackets { } which marks an option. An option consists of
- a key enclosed in curly brackets
- optionally exactly one of the following characters
- an apostrophe
'for an exclusive option - an exclamation mark
!for a required option - a hyphen
-for a preselected option - a digit
0or1for a binary challenge
- an apostrophe
- and usually text separated by whitespace from what came before it.
In your case, a whitespace character is missing before the option’s text.
Solution
Make sure to leave whitespace before the text of an option. A single space is enough:
{x} 42