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

Find a regex pattern that matches the following string:
2016%2305%2319T11:42:02 [/INST] pattern:
\d{4}%23\d{2}%23\d{2}T\d{2}:\d{2}:\d{2} </s>