I have the below list of files

aro_tty-mIF-45875564pmo_opt
aro_tty-mIF-45875664pmo_opt
aro_tty-mIF-45875964pmo_opt
aro_tty-mIF-45875514pmo_opt
aro_tty-mIF-45875524pmo_opt

that I need to rename to

aro_tty-mImpFRA-45875564pmo_opt
aro_tty-mImpFRA-45875664pmo_opt
aro_tty-mImpFRA-45875964pmo_opt
aro_tty-mImpFRA-45875514pmo_opt
aro_tty-mImpFRA-45875524pmo_opt