[RESOLVED] How to check duplicate digit?

[standardusr]

Dear all expert programmer,
I want to make project to check duplicate digit. Please see data below.

set1 = "0123-4506"
set2 = "1234-4506-8899"
set3 = "0123-1234-4506"

Summary data is "0123-4506-1234-4506-8899-0123-1234-4506"

After check duplicate in all set it will be show result below

Dup3 = "4506" (That mean it have number of 4506 = 3)
Dup2 = "0123-1234" (That mean have number of 0124 and 1234 = 2)
Dup1 = "8899" (That mean it have number of 8899 = 1)

Please tell me how to code it.

Thank you for all answer.