Number rows based on text column

[khanp27]

I have a text column which I want to number and increment based on a condition. For example : where ever word "Finished' appears in text column just increment the number. 

Sample dataset

Text column

started running uefhrgfge

absdbd

jadhuesahd

ejuh3w

eurwe

finished feuihref

Started running swhdwe

dfiogehr

rgj

rejgir

rgmjoeg

finished swhdwe

Desired output 

[rzdodson]

@khanp27 here is one (lazy) solution for you :)

[caltang]

Added some finesse to it!

[flying008]

Hi, @khanp27 

FYI.