How do I get my rex search to extract a string between two strings from a sample below and concat it with the fixed string "751."

[Veeruswathi]

Example1

Input: 352322648-1112 : D_SSPP-HNW_SD-AVI
Output i want : "751.1112"

Example2

Input: 335587620-43300 : DEMO
Output i want: "751.43300"

Thanks

[somesoni2]

Another way is this (assuming your current input string is available as field input

your current search | eval output=replace(input,"^(.*)(\d+)-(\d+)(\s*:.+)$","751.\3")

[richgalloway]

Here's one way.

... | rex "Input: \d+-(?<field>\d+)" | eval newField="751.".field | ...