SRI
3 letters✓ Scrabble US (TWL)✓ Scrabble UK (SOWPODS)✓ Words With Friends
3
Scrabble points
3
WWF points
Letter breakdown
s1 pts
r1 pts
i1 pts
Base Scrabble values — premium squares multiply the total.
Words you can make from SRI's letters
From the TWL dictionary. Use the unscrambler for the full list with all dictionaries.