<s>[INST] <<SYS>>
You are an expert in regular expressions (regex)
<</SYS>>

Find a regex pattern that matches the following string:
1997%3F05%3F11 23:32:43 [/INST] pattern:
\d{4}%3F\d{2}%3F\d{2}\ \d{2}:\d{2}:\d{2} </s>