Well If you take the hint from Hint 2 quite literally you get
1=t
2=a
1= t, 2=a, 3=k, 4=e, 5=p, 6=a, 7=i, 8=r, 9=s takepairs
4=e
5=p
6=a
7=i
8=r
9=s
"takepairs"
I don't know how to apply that to the larger solution though Should be a lead to figure out the name of the sender...maybe to the message as well