I have a list that contains the names of hosts available in our company.

For example :

• gswast03
• gkjbossp1
• frdwop04

The last characters t, p, q before the number represent the environment of the host. All strings end with a number.

• t for test
• p for prod
• q for qas

I need a reqular expression to obtain the character that is leading to number at the and of the host name (I need a solution for a single string not all list in a file)

For example :

gswas**t**03   : In this string, I just want to extract **t** character.

Thank you in advance.