# [Factor](https://factorcode.org), <sup><s> 31 </s></sup> 28 bytes ```lang-factor [ 33 interleaved [I !${}!I]] ```` [Attempt This Online!](https://ato.pxeger.com/run?1=JY29DoIwFEb3PsWFuOrCYmAWgxgxMU6E4QZuidC0tS3GxPgkLgzqU_givo0__ZZzhpN8tyfH2ikzvuV-l22WMRykI6OVQEfQk5EkwNJxIFmTndHZGbSQMBaibQB5p3LAPibWb826YfAdL1bFIvlrnhYsT3vSXas02Faj6n4FduFjcHw6f5UQRf5SEJ6ogTKDYHK5BllV-eReoxBex9HzAw) * `33 interleaved` Insert an exclamation point between each character of the input. * `[I !${}!I]` Interpolate the above string into the `${}`, adding exclamation points to the beginning and end, and print.