Is it possible in activeadmin to make multiple form selects for one field in a table?

Question

Ruby on Rails

The activeadmin gem, I wonder if there is a fundamental possibility to do the following:
We have one field of the string type in the database table, in the activeadmin form there are several selects for this field, for example, one with a list of numbers, the second of letters, and the value of the form "1f" should be written accordingly.