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

Find a regex pattern that matches the following string:
2013%5F08%5F10T12%5F13%5F23Z [/INST] pattern:
\d{4}%5F\d{2}%5F\d{2}T\d{2}%5F\d{2}%5F\d{2}Z </s>