Threw - It is the past tense of the verb throw
Or
Through - From on end or side of something to the other
From beginning to the end of a thing or period of time
Or
Thru - THROUGH prep, simplified spelling of the word t-h-r-o-u-g-h.
THRU usually not used.
We drove through the tunnel
He worked through the night

 out of  found this valuable. Do you find this valuable?