Pick up certain values from Richtext box1 to Datagridview C#

Question

Hello Expert C#,

 

i have a Richtextbox1 with 100 lines. it is mixed with alphanumberic lines.

i only wanted lines which is meeting following parameters.

 

1st 3 letters are Numeric

4th letter should be dash "-"

from 5th to 12 letters are numeric

from 13th to 18 letter are alphabet

19th letter is forward slash "/"

 

example lines - 789-12123434LHRMUC/

 

i only need lines to Richtexbox2 which meet above parameters.

 

kindly help to sort this.