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5 letter words:

ritzy17,

4 letter words:

sizy16, ritz13, sitz13, zits13, rits4, stir4,

3 letter words:

riz12, zit12, sty6, try6, its3, rit3, sir3, sit3, sri3, tis3,

2 letter words:

is2, it2, si2, st2, ti2,