Hi @wu cong?
There are different ways of achieving it. I will be sharing a few below:
When you brush over the text '[2]', the UI provides the suggestions:
Here, I have selected 'digit after UNSCHEDULED1' as this is a constant value across the data.
In case the text 'UNSCHEDULED1' is not constant then we can opt for Trifacta patterns:
`{upper}{11}{digit}`
There are other suggestions too. Please try them and select the most appropriate one.
Hope this helps.
Best,
Apeksha